diff --git a/addons/tau-plot/plot/xy/pane_renderer.gd b/addons/tau-plot/plot/xy/pane_renderer.gd
index 52a19d7..088f508 100644
--- a/addons/tau-plot/plot/xy/pane_renderer.gd
+++ b/addons/tau-plot/plot/xy/pane_renderer.gd
@@ -536,7 +536,10 @@ class PaneRenderer extends Control:
 					continue
 				var label: String = p_decorate_fn.call(p_categories[i])
 				var label_size := _measure_label(label)
-				var label_center_x := p_pane_rect.position.x + (float(i) + 0.5) * step_px
+				# By default a horizontal axis displays the first category on the left,
+				# when inverted the first category is on the right.
+				var slot := (n - 1 - i) if p_cfg.inverted else i
+				var label_center_x := p_pane_rect.position.x + (float(slot) + 0.5) * step_px
 				var label_y: float
 				if is_bottom:
 					label_y = axis_y + tick_length + label_gap
@@ -613,7 +616,10 @@ class PaneRenderer extends Control:
 					continue
 				var label: String = p_decorate_fn.call(p_categories[i])
 				var label_size := _measure_label(label)
-				var label_center_y := p_pane_rect.position.y + (float(i) + 0.5) * step_px
+				# By default a vertical axis displays the first category at the bottom,
+				# when inverted the first category is at the top.
+				var slot := i if p_cfg.inverted else (n - 1 - i)
+				var label_center_y := p_pane_rect.position.y + (float(slot) + 0.5) * step_px
 				var label_x: float
 				if is_left:
 					label_x = axis_x - tick_length - label_gap - label_size.x
diff --git a/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd b/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd
new file mode 100644
index 0000000..dcf16a2
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd
@@ -0,0 +1,324 @@
+@tool
+extends Control
+
+func _ready() -> void:
+	_setup_test_1()
+	_setup_test_2()
+	_setup_test_3()
+	_setup_test_4()
+	_setup_test_5()
+	_setup_test_6()
+	_setup_test_7()
+	_setup_test_8()
+
+####################################################################################################
+# Test 1
+####################################################################################################
+
+func _setup_test_1() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot1.title = "BOTTOM x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot1.legend_enabled = false
+	%TestPlot1.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 2
+####################################################################################################
+
+func _setup_test_2() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot2.title = "BOTTOM x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot2.legend_enabled = false
+	%TestPlot2.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 3
+####################################################################################################
+
+func _setup_test_3() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot3.title = "TOP x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.TOP
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot3.legend_enabled = false
+	%TestPlot3.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 4
+####################################################################################################
+
+func _setup_test_4() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot4.title = "TOP x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.TOP
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot4.legend_enabled = false
+	%TestPlot4.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 5
+####################################################################################################
+
+func _setup_test_5() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot5.title = "LEFT x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot5.legend_enabled = false
+	%TestPlot5.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 6
+####################################################################################################
+
+func _setup_test_6() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot6.title = "LEFT x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot6.legend_enabled = false
+	%TestPlot6.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 7
+####################################################################################################
+
+func _setup_test_7() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot7.title = "RIGHT x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot7.legend_enabled = false
+	%TestPlot7.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 8
+####################################################################################################
+
+func _setup_test_8() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot8.title = "RIGHT x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot8.legend_enabled = false
+	%TestPlot8.plot_xy(dataset, config, bindings)
diff --git a/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd.uid b/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd.uid
new file mode 100644
index 0000000..6f9f370
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd.uid
@@ -0,0 +1 @@
+uid://cxyyy8f3a6hgj
diff --git a/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.tscn b/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.tscn
new file mode 100644
index 0000000..1cebb9d
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.tscn
@@ -0,0 +1,113 @@
+[gd_scene load_steps=3 format=3 uid="uid://dgdj40wm2ygoe"]
+
+[ext_resource type="Script" uid="uid://cxyyy8f3a6hgj" path="res://addons/tau-plot/tests/axis/inverted/test_categorical_x_axis_inversion.gd" id="1_su0w7"]
+[ext_resource type="Script" uid="uid://dnhvsf2wip771" path="res://addons/tau-plot/plot/plot.gd" id="2_31sga"]
+
+[node name="Bars" type="VBoxContainer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_su0w7")
+
+[node name="Title" type="Label" parent="."]
+layout_mode = 2
+theme_override_font_sizes/font_size = 32
+text = "Test categorical x-axis inversion"
+horizontal_alignment = 1
+
+[node name="GridContainer" type="GridContainer" parent="."]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/h_separation = 0
+theme_override_constants/v_separation = 0
+columns = 2
+
+[node name="TestPlot1" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "BOTTOM CATEGORICAL x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot2" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "BOTTOM CATEGORICAL x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot3" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "TOP CATEGORICAL x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot4" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "TOP CATEGORICAL x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot5" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "LEFT CATEGORICAL x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot6" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "LEFT CATEGORICAL x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot7" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "RIGHT CATEGORICAL x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot8" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_31sga")
+title = "RIGHT CATEGORICAL x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
diff --git a/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd b/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd
new file mode 100644
index 0000000..2d6737c
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd
@@ -0,0 +1,324 @@
+@tool
+extends Control
+
+func _ready() -> void:
+	_setup_test_1()
+	_setup_test_2()
+	_setup_test_3()
+	_setup_test_4()
+	_setup_test_5()
+	_setup_test_6()
+	_setup_test_7()
+	_setup_test_8()
+
+####################################################################################################
+# Test 1
+####################################################################################################
+
+func _setup_test_1() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot1.title = "BOTTOM x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot1.legend_enabled = false
+	%TestPlot1.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 2
+####################################################################################################
+
+func _setup_test_2() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot2.title = "BOTTOM x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot2.legend_enabled = false
+	%TestPlot2.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 3
+####################################################################################################
+
+func _setup_test_3() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot3.title = "TOP x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.TOP
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot3.legend_enabled = false
+	%TestPlot3.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 4
+####################################################################################################
+
+func _setup_test_4() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot4.title = "TOP x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.TOP
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot4.legend_enabled = false
+	%TestPlot4.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 5
+####################################################################################################
+
+func _setup_test_5() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot5.title = "LEFT x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot5.legend_enabled = false
+	%TestPlot5.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 6
+####################################################################################################
+
+func _setup_test_6() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot6.title = "LEFT x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot6.legend_enabled = false
+	%TestPlot6.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 7
+####################################################################################################
+
+func _setup_test_7() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot7.title = "RIGHT x-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = false
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot7.legend_enabled = false
+	%TestPlot7.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 8
+####################################################################################################
+
+func _setup_test_8() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(["A"], PackedFloat64Array([9.0, 11.0]), [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot8.title = "RIGHT x-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.inverted = true
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot8.legend_enabled = false
+	%TestPlot8.plot_xy(dataset, config, bindings)
diff --git a/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd.uid b/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd.uid
new file mode 100644
index 0000000..4243caf
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd.uid
@@ -0,0 +1 @@
+uid://esopp0mxi533
diff --git a/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.tscn b/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.tscn
new file mode 100644
index 0000000..a57ba42
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.tscn
@@ -0,0 +1,113 @@
+[gd_scene load_steps=3 format=3 uid="uid://bdqvvole02srl"]
+
+[ext_resource type="Script" uid="uid://esopp0mxi533" path="res://addons/tau-plot/tests/axis/inverted/test_continuous_x_axis_inversion.gd" id="1_n1v05"]
+[ext_resource type="Script" uid="uid://dnhvsf2wip771" path="res://addons/tau-plot/plot/plot.gd" id="2_il284"]
+
+[node name="Bars" type="VBoxContainer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_n1v05")
+
+[node name="Title" type="Label" parent="."]
+layout_mode = 2
+theme_override_font_sizes/font_size = 32
+text = "Test continuous x-axis inversion"
+horizontal_alignment = 1
+
+[node name="GridContainer" type="GridContainer" parent="."]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/h_separation = 0
+theme_override_constants/v_separation = 0
+columns = 2
+
+[node name="TestPlot1" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "BOTTOM x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot2" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "BOTTOM x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot3" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "TOP x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot4" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "TOP x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot5" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "LEFT x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot6" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "LEFT x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot7" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "RIGHT x-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot8" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_il284")
+title = "RIGHT x-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
diff --git a/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd b/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd
new file mode 100644
index 0000000..230fe75
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd
@@ -0,0 +1,324 @@
+@tool
+extends Control
+
+func _ready() -> void:
+	_setup_test_1()
+	_setup_test_2()
+	_setup_test_3()
+	_setup_test_4()
+	_setup_test_5()
+	_setup_test_6()
+	_setup_test_7()
+	_setup_test_8()
+
+####################################################################################################
+# Test 1
+####################################################################################################
+
+func _setup_test_1() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot1.title = "LEFT y-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = false
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot1.legend_enabled = false
+	%TestPlot1.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 2
+####################################################################################################
+
+func _setup_test_2() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot2.title = "LEFT y-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_left_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.LEFT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot2.legend_enabled = false
+	%TestPlot2.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 3
+####################################################################################################
+
+func _setup_test_3() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot3.title = "RIGHT y-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = false
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_right_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.RIGHT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot3.legend_enabled = false
+	%TestPlot3.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 4
+####################################################################################################
+
+func _setup_test_4() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot4.title = "RIGHT y-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_right_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.BOTTOM
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.RIGHT
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot4.legend_enabled = false
+	%TestPlot4.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 5
+####################################################################################################
+
+func _setup_test_5() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot5.title = "TOP y-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = false
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_top_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.TOP
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot5.legend_enabled = false
+	%TestPlot5.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 6
+####################################################################################################
+
+func _setup_test_6() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot6.title = "TOP y-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_top_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.TOP
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot6.legend_enabled = false
+	%TestPlot6.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 7
+####################################################################################################
+
+func _setup_test_7() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot7.title = "BOTTOM y-axis not inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = false
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot7.legend_enabled = false
+	%TestPlot7.plot_xy(dataset, config, bindings)
+
+####################################################################################################
+# Test 8
+####################################################################################################
+
+func _setup_test_8() -> void:
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(["A"], ["alpha", "beta"], [PackedFloat64Array([1.23, 4.56])])
+
+	%TestPlot8.title = "BOTTOM y-axis inverted"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+
+	var y_axis := TauAxisConfig.new()
+	y_axis.type = TauAxisConfig.Type.CONTINUOUS
+	y_axis.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane := TauPaneConfig.new()
+	pane.y_bottom_axis = y_axis
+	pane.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.LEFT
+	config.panes = [pane]
+
+	var sb := TauXYSeriesBinding.new()
+	sb.series_id = dataset.get_series_id_by_index(0)
+	sb.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb.pane_index = 0
+
+	var bindings: Array[TauXYSeriesBinding] = [sb]
+
+	%TestPlot8.legend_enabled = false
+	%TestPlot8.plot_xy(dataset, config, bindings)
diff --git a/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd.uid b/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd.uid
new file mode 100644
index 0000000..8cabc60
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd.uid
@@ -0,0 +1 @@
+uid://c86qiqrp8e5mm
diff --git a/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.tscn b/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.tscn
new file mode 100644
index 0000000..8a8533d
--- /dev/null
+++ b/addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.tscn
@@ -0,0 +1,113 @@
+[gd_scene load_steps=3 format=3 uid="uid://dossh7dnbslt8"]
+
+[ext_resource type="Script" uid="uid://c86qiqrp8e5mm" path="res://addons/tau-plot/tests/axis/inverted/test_continuous_y_axis_inversion.gd" id="1_20f1u"]
+[ext_resource type="Script" uid="uid://dnhvsf2wip771" path="res://addons/tau-plot/plot/plot.gd" id="2_5kgyj"]
+
+[node name="Bars" type="VBoxContainer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_20f1u")
+
+[node name="Title" type="Label" parent="."]
+layout_mode = 2
+theme_override_font_sizes/font_size = 32
+text = "Test continuous y-axis inversion"
+horizontal_alignment = 1
+
+[node name="GridContainer" type="GridContainer" parent="."]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/h_separation = 0
+theme_override_constants/v_separation = 0
+columns = 2
+
+[node name="TestPlot1" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "LEFT y-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot2" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "LEFT y-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot3" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "RIGHT y-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot4" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "RIGHT y-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot5" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "TOP y-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot6" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "TOP y-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot7" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "BOTTOM y-axis not inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot8" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_5kgyj")
+title = "BOTTOM y-axis inverted"
+legend_enabled = false
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
diff --git a/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_left.gd b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_left.gd
index ba90c66..578ebb8 100644
--- a/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_left.gd
+++ b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_left.gd
@@ -408,9 +408,10 @@ func _setup_test_5() -> void:
 
 	%TestPlot5.title = "[SHARED_X] Append to 3 panes (2:1:1 stretch ratio)"
 
-	var x_axis := TauAxisConfig.new()
-	x_axis.type = TauAxisConfig.Type.CONTINUOUS
-	x_axis.scale = TauAxisConfig.Scale.LINEAR
+	var time_axis := TauAxisConfig.new()
+	time_axis.type = TauAxisConfig.Type.CONTINUOUS
+	time_axis.scale = TauAxisConfig.Scale.LINEAR
+	time_axis.title = "Time"
 
 	var y_l := TauAxisConfig.new()
 	y_l.title = "Left"
@@ -448,7 +449,7 @@ func _setup_test_5() -> void:
 	pane_r.overlays = [bar_config]
 
 	var config := TauXYConfig.new()
-	config.x_axis = x_axis
+	config.x_axis = time_axis
 	config.x_axis_id = TauPlot.AxisId.LEFT
 	config.panes = [pane_l, pane_m, pane_r]
 
diff --git a/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd
new file mode 100644
index 0000000..2dfc67f
--- /dev/null
+++ b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd
@@ -0,0 +1,607 @@
+@tool
+extends Control
+
+var _timer: Timer = null
+var _t: float = 0.0
+
+var _datasets: Array[TauPlot.Dataset] = []
+var _state: Array[Dictionary] = []
+
+func _ready() -> void:
+	_create_timer()
+	_setup_all_tests()
+	_timer.start()
+
+
+func _create_timer() -> void:
+	_timer = Timer.new()
+	_timer.one_shot = false
+	_timer.wait_time = 0.016
+	_timer.timeout.connect(_on_tick)
+	add_child(_timer)
+
+
+func _setup_all_tests() -> void:
+	_datasets.clear()
+	_state.clear()
+
+	_setup_test_1()
+	_setup_test_2()
+	_setup_test_3()
+	_setup_test_4()
+	_setup_test_5()
+	_setup_test_6()
+
+
+func _on_tick() -> void:
+	_t += _timer.wait_time
+
+	_step_test_1()
+	_step_test_2()
+	_step_test_3()
+	_step_test_4()
+	_step_test_5()
+	_step_test_6()
+
+####################################################################################################
+# Shared initial data
+####################################################################################################
+
+const X_4: PackedFloat64Array = [0.0, 1.0, 2.0, 3.0]
+const X_6: PackedFloat64Array = [0.0, 1.0, 2.0, 3.0, 4.0, 5.0]
+const Y_A_INIT: PackedFloat64Array = [1.0, 3.0, 2.0, 4.0, 1.5, 3.5]
+const Y_B_INIT: PackedFloat64Array = [2.0, 1.5, 3.5, 1.0, 4.0, 2.5]
+const Y_C_INIT: PackedFloat64Array = [0.5, 2.5, 1.0, 3.0, 2.0, 1.0]
+const Y_D_INIT: PackedFloat64Array = [3.0, 0.5, 2.0, 1.5, 1.0, 1.5]
+
+const SAMPLE_COUNT := 6
+
+const CATS_INIT: PackedStringArray = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
+
+const CAPACITY := 64
+
+####################################################################################################
+# Test 1
+####################################################################################################
+
+func _setup_test_1() -> void:
+	var series_names := PackedStringArray(["A", "B"])
+	var dataset := TauPlot.Dataset.make_per_series_x_continuous(series_names, [X_6, X_6], [Y_A_INIT, Y_B_INIT])
+	_datasets.append(dataset)
+
+	%TestPlot1.title = "[PER_SERIES_X] Update both series Y values, invert y axes"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.title = "X axis"
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.scale = TauAxisConfig.Scale.LINEAR
+	x_axis.tick_count_preferred = SAMPLE_COUNT
+
+	var bottom_a := TauAxisConfig.new()
+	bottom_a.title = "A Y values"
+	bottom_a.type = TauAxisConfig.Type.CONTINUOUS
+	bottom_a.include_zero_in_domain = true
+	bottom_a.inverted = true
+
+	var bottom_b := TauAxisConfig.new()
+	bottom_b.title = "B Y values"
+	bottom_b.type = TauAxisConfig.Type.CONTINUOUS
+	bottom_b.include_zero_in_domain = true
+	bottom_b.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+	bar_config.bar_width_policy = TauBarConfig.BarWidthPolicy.DATA_UNITS
+	bar_config.bar_width_x_units = 0.6
+
+	var pane_a := TauPaneConfig.new()
+	pane_a.y_bottom_axis = bottom_a
+	pane_a.overlays = [bar_config]
+
+	var pane_b := TauPaneConfig.new()
+	pane_b.y_bottom_axis = bottom_b
+	pane_b.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane_a, pane_b]
+
+	var sb_a := TauXYSeriesBinding.new()
+	sb_a.series_id = dataset.get_series_id_by_index(0)
+	sb_a.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_a.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_a.pane_index = 0
+
+	var sb_b := TauXYSeriesBinding.new()
+	sb_b.series_id = dataset.get_series_id_by_index(1)
+	sb_b.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_b.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_b.pane_index = 1
+
+	var bindings: Array[TauXYSeriesBinding] = [sb_a, sb_b]
+
+	%TestPlot1.plot_xy(dataset, config, bindings)
+
+	_state.append({
+		"dataset": dataset
+	})
+
+
+func _step_test_1() -> void:
+	var st := _state[0]
+	var dataset: TauPlot.Dataset = st["dataset"]
+	var series_id_a = dataset.get_series_id_by_index(0)
+	var series_id_b = dataset.get_series_id_by_index(1)
+
+	dataset.begin_batch()
+	for i in range(SAMPLE_COUNT):
+		var base: float = Y_A_INIT[i]
+		var y_new_a := base + 2.0 * sin(_t * 1.5 + float(i) * 0.85)
+		var y_new_b := base + 2.0 * sin(_t * 1.3 + float(i) * 0.75)
+		dataset.set_series_y(series_id_a, i, y_new_a)
+		dataset.set_series_y(series_id_b, i, y_new_b)
+	dataset.end_batch()
+
+####################################################################################################
+# Test 2
+####################################################################################################
+
+func _setup_test_2() -> void:
+	var series_names := PackedStringArray(["A"])
+	var dataset := TauPlot.Dataset.make_per_series_x_continuous(series_names, [X_6], [Y_A_INIT])
+	_datasets.append(dataset)
+
+	%TestPlot2.title = "[PER_SERIES_X] Single series, two panes, invert y axes"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.title = "X axis"
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.scale = TauAxisConfig.Scale.LINEAR
+	x_axis.tick_count_preferred = SAMPLE_COUNT
+
+	var bar_axis := TauAxisConfig.new()
+	bar_axis.title = "BAR"
+	bar_axis.type = TauAxisConfig.Type.CONTINUOUS
+	bar_axis.include_zero_in_domain = true
+	bar_axis.inverted = true
+
+	var scatter_axis := TauAxisConfig.new()
+	scatter_axis.title = "SCATTER"
+	scatter_axis.type = TauAxisConfig.Type.CONTINUOUS
+	scatter_axis.include_zero_in_domain = true
+	scatter_axis.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+	bar_config.bar_width_policy = TauBarConfig.BarWidthPolicy.DATA_UNITS
+	bar_config.bar_width_x_units = 0.6
+
+	var scatter_config := TauScatterConfig.new()
+	scatter_config.marker_size_policy = TauScatterConfig.MarkerSizePolicy.DATA_UNITS
+	scatter_config.marker_size_data_units = 0.6
+
+	var pane_l := TauPaneConfig.new()
+	pane_l.y_bottom_axis = bar_axis
+	pane_l.overlays = [bar_config]
+
+	var pane_r := TauPaneConfig.new()
+	pane_r.y_bottom_axis = scatter_axis
+	pane_r.overlays = [scatter_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane_l, pane_r]
+
+	var sb_l := TauXYSeriesBinding.new()
+	sb_l.series_id = dataset.get_series_id_by_index(0)
+	sb_l.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_l.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_l.pane_index = 0
+
+	var sb_r := TauXYSeriesBinding.new()
+	sb_r.series_id = dataset.get_series_id_by_index(0)
+	sb_r.overlay_type = TauXYSeriesBinding.PaneOverlayType.SCATTER
+	sb_r.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_r.pane_index = 1
+
+	var bindings: Array[TauXYSeriesBinding] = [sb_l, sb_r]
+
+	%TestPlot2.plot_xy(dataset, config, bindings)
+
+	_state.append({
+		"dataset": dataset
+	})
+
+
+func _step_test_2() -> void:
+	var st := _state[1]
+	var dataset: TauPlot.Dataset = st["dataset"]
+	var series_id_a = dataset.get_series_id_by_index(0)
+
+	dataset.begin_batch()
+	for i in range(SAMPLE_COUNT):
+		var base: float = Y_A_INIT[i]
+		var y_new_a := base + 2.0 * sin(_t * 1.5 + float(i) * 0.85)
+		dataset.set_series_y(series_id_a, i, y_new_a)
+	dataset.end_batch()
+
+
+####################################################################################################
+# Test 3
+####################################################################################################
+
+func _setup_test_3() -> void:
+	var series_names := PackedStringArray(["A", "B"])
+	var dataset := TauPlot.Dataset.make_per_series_x_continuous(series_names, [X_6, X_6], [Y_A_INIT, Y_B_INIT])
+	_datasets.append(dataset)
+
+	%TestPlot3.title = "[PER_SERIES_X] Update both series Y values, invert y axes"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.title = "X axis"
+	x_axis.type = TauAxisConfig.Type.CONTINUOUS
+	x_axis.scale = TauAxisConfig.Scale.LINEAR
+	x_axis.tick_count_preferred = SAMPLE_COUNT
+
+	var bottom_a := TauAxisConfig.new()
+	bottom_a.title = "A Y values"
+	bottom_a.type = TauAxisConfig.Type.CONTINUOUS
+	bottom_a.include_zero_in_domain = true
+	bottom_a.inverted = true
+
+	var bottom_b := TauAxisConfig.new()
+	bottom_b.title = "B Y values"
+	bottom_b.type = TauAxisConfig.Type.CONTINUOUS
+	bottom_b.include_zero_in_domain = true
+	bottom_b.inverted = true
+
+	var scatter_config := TauScatterConfig.new()
+	scatter_config.marker_size_policy = TauScatterConfig.MarkerSizePolicy.DATA_UNITS
+	scatter_config.marker_size_data_units = 0.6
+
+	var pane_a := TauPaneConfig.new()
+	pane_a.y_bottom_axis = bottom_a
+	pane_a.overlays = [scatter_config]
+
+	var pane_b := TauPaneConfig.new()
+	pane_b.y_bottom_axis = bottom_b
+	pane_b.overlays = [scatter_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane_a, pane_b]
+
+	var sb_a := TauXYSeriesBinding.new()
+	sb_a.series_id = dataset.get_series_id_by_index(0)
+	sb_a.overlay_type = TauXYSeriesBinding.PaneOverlayType.SCATTER
+	sb_a.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_a.pane_index = 0
+
+	var sb_b := TauXYSeriesBinding.new()
+	sb_b.series_id = dataset.get_series_id_by_index(1)
+	sb_b.overlay_type = TauXYSeriesBinding.PaneOverlayType.SCATTER
+	sb_b.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_b.pane_index = 1
+
+	var bindings: Array[TauXYSeriesBinding] = [sb_a, sb_b]
+
+	%TestPlot3.plot_xy(dataset, config, bindings)
+
+	_state.append({
+		"dataset": dataset
+	})
+
+
+func _step_test_3() -> void:
+	var st := _state[2]
+	var dataset: TauPlot.Dataset = st["dataset"]
+	var series_id_a = dataset.get_series_id_by_index(0)
+	var series_id_b = dataset.get_series_id_by_index(1)
+
+	dataset.begin_batch()
+	for i in range(SAMPLE_COUNT):
+		var base: float = Y_A_INIT[i]
+		var y_new_a := base + 2.0 * sin(_t * 1.5 + float(i) * 0.85)
+		var y_new_b := base + 2.0 * sin(_t * 1.3 + float(i) * 0.75)
+		dataset.set_series_y(series_id_a, i, y_new_a)
+		dataset.set_series_y(series_id_b, i, y_new_b)
+	dataset.end_batch()
+
+
+####################################################################################################
+# Test 4
+####################################################################################################
+
+const T4_APPEND_INTERVAL := 1.0
+const T4_NEXT_X_START := 4.0
+
+func _setup_test_4() -> void:
+	var series_names := PackedStringArray(["Volume", "Price"])
+	var y_volume := PackedFloat64Array([5.0, 8.0, 3.0, 12.0, 9.0, 10.0])
+	var y_price := PackedFloat64Array([100.0, 105.0, 98.0, 112.0, 101.0, 103.0])
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(series_names, X_6, [y_volume, y_price], CAPACITY)
+	_datasets.append(dataset)
+
+	%TestPlot4.title = "[SHARED_X] Append Price + Volume (3:1 stretch ratio), invert y axes"
+
+	var time_axis := TauAxisConfig.new()
+	time_axis.title = "Time"
+	time_axis.type = TauAxisConfig.Type.CONTINUOUS
+	time_axis.scale = TauAxisConfig.Scale.LINEAR
+
+	var price_axis := TauAxisConfig.new()
+	price_axis.title = "Price"
+	price_axis.type = TauAxisConfig.Type.CONTINUOUS
+	price_axis.include_zero_in_domain = false
+	price_axis.inverted = true
+
+	var volume_axis := TauAxisConfig.new()
+	volume_axis.title = "Volume"
+	volume_axis.type = TauAxisConfig.Type.CONTINUOUS
+	volume_axis.include_zero_in_domain = true
+	volume_axis.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+	bar_config.bar_width_policy = TauBarConfig.BarWidthPolicy.DATA_UNITS
+	bar_config.bar_width_x_units = 0.6
+
+	var pane_price := TauPaneConfig.new()
+	pane_price.y_bottom_axis = price_axis
+	pane_price.stretch_ratio = 3.0
+	pane_price.overlays = [bar_config]
+
+	var pane_vol := TauPaneConfig.new()
+	pane_vol.y_bottom_axis = volume_axis
+	pane_vol.stretch_ratio = 1.0
+	pane_vol.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = time_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane_vol, pane_price]
+
+	var sb_price := TauXYSeriesBinding.new()
+	sb_price.series_id = dataset.get_series_id_by_index(0)
+	sb_price.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_price.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_price.pane_index = 0
+
+	var sb_vol := TauXYSeriesBinding.new()
+	sb_vol.series_id = dataset.get_series_id_by_index(1)
+	sb_vol.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_vol.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_vol.pane_index = 1
+
+	var bindings: Array[TauXYSeriesBinding] = [sb_price, sb_vol]
+
+	%TestPlot4.plot_xy(dataset, config, bindings)
+
+	_state.append({
+		"dataset": dataset,
+		"next_x": T4_NEXT_X_START,
+		"last_append_t": 0.0,
+	})
+
+
+func _step_test_4() -> void:
+	var st := _state[3]
+	if _t - st["last_append_t"] < T4_APPEND_INTERVAL:
+		return
+
+	var dataset: TauPlot.Dataset = st["dataset"]
+	var next_x: float = st["next_x"]
+
+	var y_volume_new := randf_range(1.0, 15.0)
+	var y_price_new := randf_range(90.0, 120.0)
+	dataset.append_shared_sample(next_x, PackedFloat64Array([y_volume_new, y_price_new]))
+
+	st["next_x"] = next_x + T4_APPEND_INTERVAL
+	st["last_append_t"] = _t
+
+####################################################################################################
+# Test 5
+####################################################################################################
+
+const T5_APPEND_INTERVAL := 0.5
+const T5_NEXT_X_START := 4.0
+
+func _setup_test_5() -> void:
+	var series_names := PackedStringArray(["Left", "Middle", "Right"])
+	var dataset := TauPlot.Dataset.make_shared_x_continuous(series_names, X_6, [Y_A_INIT, Y_B_INIT, Y_C_INIT], CAPACITY)
+	_datasets.append(dataset)
+
+	%TestPlot5.title = "[SHARED_X] Append to 3 panes (2:1:1 stretch ratio), invert y axes"
+
+	var time_axis := TauAxisConfig.new()
+	time_axis.type = TauAxisConfig.Type.CONTINUOUS
+	time_axis.scale = TauAxisConfig.Scale.LINEAR
+	time_axis.title = "Time"
+
+	var y_l := TauAxisConfig.new()
+	y_l.title = "Left"
+	y_l.type = TauAxisConfig.Type.CONTINUOUS
+	y_l.include_zero_in_domain = true
+	y_l.inverted = true
+
+	var y_m := TauAxisConfig.new()
+	y_m.title = "Middle"
+	y_m.type = TauAxisConfig.Type.CONTINUOUS
+	y_m.include_zero_in_domain = true
+	y_m.inverted = true
+
+	var y_r := TauAxisConfig.new()
+	y_r.title = "Right"
+	y_r.type = TauAxisConfig.Type.CONTINUOUS
+	y_r.include_zero_in_domain = true
+	y_r.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+	bar_config.bar_width_policy = TauBarConfig.BarWidthPolicy.DATA_UNITS
+	bar_config.bar_width_x_units = 0.6
+
+	var pane_l := TauPaneConfig.new()
+	pane_l.y_bottom_axis = y_l
+	pane_l.stretch_ratio = 2.0
+	pane_l.overlays = [bar_config]
+
+	var pane_m := TauPaneConfig.new()
+	pane_m.y_bottom_axis = y_m
+	pane_m.stretch_ratio = 1.0
+	pane_m.overlays = [bar_config]
+
+	var pane_r := TauPaneConfig.new()
+	pane_r.y_bottom_axis = y_r
+	pane_r.stretch_ratio = 1.0
+	pane_r.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = time_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane_l, pane_m, pane_r]
+
+	var sb_left := TauXYSeriesBinding.new()
+	sb_left.series_id = dataset.get_series_id_by_index(0)
+	sb_left.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_left.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_left.pane_index = 0
+
+	var sb_mid := TauXYSeriesBinding.new()
+	sb_mid.series_id = dataset.get_series_id_by_index(1)
+	sb_mid.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_mid.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_mid.pane_index = 1
+
+	var sb_right := TauXYSeriesBinding.new()
+	sb_right.series_id = dataset.get_series_id_by_index(2)
+	sb_right.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_right.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_right.pane_index = 2
+
+	var bindings: Array[TauXYSeriesBinding] = [sb_left, sb_mid, sb_right]
+
+	%TestPlot5.plot_xy(dataset, config, bindings)
+
+	_state.append({
+		"dataset": dataset,
+		"next_x": T5_NEXT_X_START,
+		"last_append_t": 0.0,
+	})
+
+
+func _step_test_5() -> void:
+	var st := _state[4]
+	if _t - st["last_append_t"] < T5_APPEND_INTERVAL:
+		return
+
+	var dataset: TauPlot.Dataset = st["dataset"]
+	var next_x: float = st["next_x"]
+
+	var y_t_new := randf_range(1.0, 5.0)
+	var y_m_new := randf_range(1.0, 5.0)
+	var y_b_new := randf_range(1.0, 5.0)
+	dataset.append_shared_sample(next_x, PackedFloat64Array([y_t_new, y_m_new, y_b_new]))
+
+	st["next_x"] = next_x + 1.0
+	st["last_append_t"] = _t
+
+####################################################################################################
+# Test 6
+####################################################################################################
+
+const T6_APPEND_INTERVAL := 0.8
+const T6_CAT_NAMES: PackedStringArray = ["Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
+
+func _setup_test_6() -> void:
+	var series_names := PackedStringArray(["A", "B"])
+	var dataset := TauPlot.Dataset.make_shared_x_categorical(series_names, CATS_INIT, [Y_A_INIT, Y_B_INIT], 12)
+	_datasets.append(dataset)
+
+	%TestPlot6.title = "[SHARED_X] Append new categories, invert y axes"
+
+	var x_axis := TauAxisConfig.new()
+	x_axis.type = TauAxisConfig.Type.CATEGORICAL
+	x_axis.overlap_strategy = TauAxisConfig.OverlapStrategy.SKIP_LABELS
+
+	var y_l := TauAxisConfig.new()
+	y_l.title = "Left"
+	y_l.type = TauAxisConfig.Type.CONTINUOUS
+	y_l.include_zero_in_domain = true
+	y_l.inverted = true
+
+	var y_r := TauAxisConfig.new()
+	y_r.title = "Right"
+	y_r.type = TauAxisConfig.Type.CONTINUOUS
+	y_r.include_zero_in_domain = true
+	y_r.inverted = true
+
+	var bar_config := TauBarConfig.new()
+	bar_config.mode = TauBarConfig.BarMode.INDEPENDENT
+
+	var pane_t := TauPaneConfig.new()
+	pane_t.y_bottom_axis = y_l
+	pane_t.overlays = [bar_config]
+
+	var pane_b := TauPaneConfig.new()
+	pane_b.y_bottom_axis = y_r
+	pane_b.overlays = [bar_config]
+
+	var config := TauXYConfig.new()
+	config.x_axis = x_axis
+	config.x_axis_id = TauPlot.AxisId.RIGHT
+	config.panes = [pane_t, pane_b]
+
+	var sb_a := TauXYSeriesBinding.new()
+	sb_a.series_id = dataset.get_series_id_by_index(0)
+	sb_a.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_a.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_a.pane_index = 0
+
+	var sb_b := TauXYSeriesBinding.new()
+	sb_b.series_id = dataset.get_series_id_by_index(1)
+	sb_b.overlay_type = TauXYSeriesBinding.PaneOverlayType.BAR
+	sb_b.y_axis_id = TauPlot.AxisId.BOTTOM
+	sb_b.pane_index = 1
+
+	var bindings: Array[TauXYSeriesBinding] = [sb_a, sb_b]
+
+	%TestPlot6.plot_xy(dataset, config, bindings)
+
+	_state.append({
+		"dataset": dataset,
+		"cat_index": 0,
+		"last_append_t": 0.0,
+	})
+
+
+func _step_test_6() -> void:
+	var st := _state[5]
+	if _t - st["last_append_t"] < T6_APPEND_INTERVAL:
+		return
+
+	var cat_index: int = st["cat_index"]
+	var dataset: TauPlot.Dataset = st["dataset"]
+
+	# When all extra categories have been appended, clear and restart from initial data
+	if cat_index >= T6_CAT_NAMES.size():
+		dataset.begin_batch()
+		dataset.clear_samples()
+		for i in range(CATS_INIT.size()):
+			dataset.append_shared_sample(CATS_INIT[i], PackedFloat64Array([Y_A_INIT[i], Y_B_INIT[i]]))
+		dataset.end_batch()
+		st["cat_index"] = 0
+		st["last_append_t"] = _t
+		return
+
+	var cat_name: String = T6_CAT_NAMES[cat_index]
+
+	var y_a_new := randf_range(1.0, 5.0)
+	var y_b_new := randf_range(1.0, 5.0)
+	dataset.append_shared_sample(cat_name, PackedFloat64Array([y_a_new, y_b_new]))
+
+	st["cat_index"] = cat_index + 1
+	st["last_append_t"] = _t
diff --git a/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd.uid b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd.uid
new file mode 100644
index 0000000..a753d31
--- /dev/null
+++ b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd.uid
@@ -0,0 +1 @@
+uid://b26c5weu7pton
diff --git a/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.tscn b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.tscn
new file mode 100644
index 0000000..15d1eab
--- /dev/null
+++ b/addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.tscn
@@ -0,0 +1,85 @@
+[gd_scene load_steps=3 format=3 uid="uid://wirl8cjglywm"]
+
+[ext_resource type="Script" uid="uid://b26c5weu7pton" path="res://addons/tau-plot/tests/plot/vertical_x_axis/test_vertical_x_axis_right.gd" id="1_wvmp1"]
+[ext_resource type="Script" uid="uid://dnhvsf2wip771" path="res://addons/tau-plot/plot/plot.gd" id="2_k87u7"]
+
+[node name="Bars" type="VBoxContainer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_wvmp1")
+
+[node name="Title" type="Label" parent="."]
+layout_mode = 2
+theme_override_font_sizes/font_size = 32
+text = "Test right x-axis"
+horizontal_alignment = 1
+
+[node name="GridContainer" type="GridContainer" parent="."]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/h_separation = 0
+theme_override_constants/v_separation = 0
+columns = 3
+
+[node name="TestPlot1" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_k87u7")
+title = "[PER_SERIES_X] Update both series Y values, invert y axes"
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot2" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_k87u7")
+title = "[PER_SERIES_X] Single series, two panes, invert y axes"
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot3" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_k87u7")
+title = "[PER_SERIES_X] Update both series Y values, invert y axes"
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot4" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_k87u7")
+title = "[SHARED_X] Append Price + Volume (3:1 stretch ratio), invert y axes"
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot5" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_k87u7")
+title = "[SHARED_X] Append to 3 panes (2:1:1 stretch ratio), invert y axes"
+metadata/_custom_type_script = "uid://dnhvsf2wip771"
+
+[node name="TestPlot6" type="PanelContainer" parent="GridContainer"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+theme_type_variation = &"TauPlot"
+script = ExtResource("2_k87u7")
+title = "[SHARED_X] Append new categories, invert y axes"
+metadata/_custom_type_script = "uid://dnhvsf2wip771"