diff --git a/src/pages/overall/overall-line/overall-line.ts b/src/pages/overall/overall-line/overall-line.ts
index 284e648..35507ee 100644
--- a/src/pages/overall/overall-line/overall-line.ts
+++ b/src/pages/overall/overall-line/overall-line.ts
@@ -115,6 +115,7 @@ export default class OverallLine extends Vue
             name: course.name,
             type: 'line',
             smooth: true,
+            symbol: 'none', // circle, diamond, emptyCircle, none
             data: this.toDateRange([...assignments.map(a => a.time)].map((time, i) =>
             {
                 // Find subset before this assignment