diff --git a/src/pages/course/course-scatter/course-scatter.ts b/src/pages/course/course-scatter/course-scatter.ts
index 43f5420..1689833 100644
--- a/src/pages/course/course-scatter/course-scatter.ts
+++ b/src/pages/course/course-scatter/course-scatter.ts
@@ -78,7 +78,11 @@ export default class CourseScatter extends Vue
             // Tooltip
             tooltip:
             {
-                trigger: 'axis'
+                trigger: 'axis',
+                axisPointer:
+                {
+                    type: 'cross'
+                }
             },
 
             legend: