add a dot on the yellow line for hour 12, 16, 20 & 24

index.html

@@ -84,8 +84,10 @@ yAxisID: 'y1',
                             target: 'origin',
                             above: 'rgba(255, 223, 0, 0.2)'
                         },
-yAxisID: 'y2',
-                        pointRadius: 0,
+                        yAxisID: 'y2',
+                        pointRadius: [0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,5,0,0,0,5,0,0,5],
+                        pointBackgroundColor: '#ffdf00',
+                        pointHoverRadius: 7,
                         borderWidth: 2
                     },
 {