Marker Clusters

The marker clusters method is often used with scatter charts to display the density of large numbers of continuous data simply and effectively.
The demo displays the 2012 Olympics athletes’ height and weight density using the marker clusters method.

Good to know


  • Ease the readability of a huge number of data by gathering close data.
  • Increase performance
  • Use with scatter charts and maps
  • An excellent method to highlight outliers


  • A scatter chart can be easily cluttered with a large number of series.


You can create cluster markers charts using different algorithms such as grid, k-means, and optimizedKmeans. It is also possible to display both marker clusters and scatter points on the same chart for deeper analysis.


Learn more about how to create marker clusters with Highcharts.