diff --git a/src/components/d3/monitoring/D3HorizontalCursor.tsx b/src/components/d3/monitoring/D3HorizontalCursor.tsx
index 4466254..af75ff0 100644
--- a/src/components/d3/monitoring/D3HorizontalCursor.tsx
+++ b/src/components/d3/monitoring/D3HorizontalCursor.tsx
@@ -139,7 +139,7 @@ const _D3HorizontalCursor = <DataType,>({
         if (!mouseState.visible || fixed) return
 
         let top = mouseState.y + offsetY
-        if (top + height / 2 >= sizes.chartsHeight) {
+        if (mouseState.y >= sizes.chartsHeight / 2) {
             setPosition('bottom')
             top = mouseState.y - offsetY - height
         } else {