Uses a K-D Tree structure to create Highcharts tooltips instead of using the marker's SVG shapes
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This is a plugin for Highcharts to highlight the nearest marker. Instead of using mouse-over events, it relies on a tree data structure to find the neares marker.


  • Doesn't rely on SVG mouse-over events. This will work transparently with a canvas renderer (
  • Doesn't require markers to be drawn. Otherwise "transparent markers" would had been needed.


  • Won't work on shared tooltip and probably number of other special cases.
  • This might not be what you want


This demo is based on the Extended Heatmap Demo (, modified to use this plugin instead of the inline code