diff --git a/models/acc_operation.py b/models/acc_operation.py
index 830449a621cc7b07b6410a636254ae44d55d1dfb..dd248477046f2399a0c0e64fc914b6296a2fba93 100644
--- a/models/acc_operation.py
+++ b/models/acc_operation.py
@@ -1317,6 +1317,12 @@ class AccOperation(models.Model):
         scale, step_courbe, step_display_courbe = self.get_step_from_date(
             date_start=date_start, date_end=date_end, scale=scale
         )
+
+        if scale == "week" or scale == "day":
+            is_curve_line = True
+        else:
+            is_curve_line = False
+
         # Get the data to display in chart
         chart_data = self.get_cdc(
             scale=scale,
@@ -1346,6 +1352,7 @@ class AccOperation(models.Model):
                 "date_min": date_min,
                 "date_max": date_max,
                 "scale": scale_init,
+                "is_curve_line": is_curve_line,
             }
         )
         return result_graph