diff --git a/cmd/bsky-modactions/munin.go b/cmd/bsky-modactions/munin.go
--- a/cmd/bsky-modactions/munin.go
+++ b/cmd/bsky-modactions/munin.go
@@ -27,17 +27,18 @@ w.WriteHeader(http.StatusInternalServerError)
 		return
 	}
 
-	fmt.Fprint(w, "graph_title bluesky labels added (top 8)\n")
+	fmt.Fprint(w, "graph_title bluesky labels added (top 8, 15m MA)\n")
 	fmt.Fprint(w, "graph_category bluesky\n")
 	fmt.Fprint(w, "graph_vlabel labels / ${graph_period}\n")
 	fmt.Fprint(w, "graph_period minute\n")
 	fmt.Fprint(w, "graph_width 600\n")
 	fmt.Fprint(w, "graph_height 300\n")
 
-	for _, label := range labels {
-		slug := sanitize.ReplaceAll([]byte(label), []byte("_"))
-		fmt.Fprintf(w, "%s.label %s\n", slug, label)
+	for _, labelName := range labels {
+		slug := sanitize.ReplaceAll([]byte(labelName), []byte("_"))
+		fmt.Fprintf(w, "%s.label %s\n", slug, labelName)
 		fmt.Fprintf(w, "%s.type DERIVE\n", slug)
+		fmt.Fprintf(w, "%s.cdef %s,900,TRENDNAN\n", slug, slug)
 	}
 }
 
@@ -49,8 +50,8 @@ return
 	}
 
 	for _, label := range labels {
-		key := label.Member.(string)
-		slug := sanitize.ReplaceAll([]byte(key), []byte("_"))
+		labelName := label.Member.(string)
+		slug := sanitize.ReplaceAll([]byte(labelName), []byte("_"))
 		fmt.Fprintf(w, "%s.value %0.f\n", slug, label.Score)
 	}
 }