diff --git a/frontend/app/pages/commune/[slug]/index.vue b/frontend/app/pages/commune/[slug]/index.vue
index 1fb6f64..15702cf 100644
--- a/frontend/app/pages/commune/[slug]/index.vue
+++ b/frontend/app/pages/commune/[slug]/index.vue
@@ -1295,14 +1295,16 @@ const gridPrices2 = computed(() => {
   return arr
 })
 
-function toPolyline(vols: number[] | undefined, vals: number[] | undefined, cyFn: (v: number) => number): string {
+function toPolyline(vols: number[] | undefined, vals: number[] | undefined, cyFn: (v: number) => number, minVol = 15): string {
   if (!vols?.length || !vals?.length) return ''
   const pts: string[] = []
   for (let i = 0; i < vols.length; i += 4) {
-    pts.push(`${cx2(vols[i]!)},${cyFn(vals[i]!)}`)
+    const v = vols[i]!
+    if (v < minVol) continue
+    pts.push(`${cx2(v)},${cyFn(vals[i]!)}`)
   }
   const last = vols.length - 1
-  if (last % 4 !== 0) pts.push(`${cx2(vols[last]!)},${cyFn(vals[last]!)}`)
+  if (last % 4 !== 0 && vols[last]! >= minVol) pts.push(`${cx2(vols[last]!)},${cyFn(vals[last]!)}`)
   return pts.join(' ')
 }