A chord diagram or an extended diagram is basically used to show data flow between multiple entities. We can have a circular chord diagram or an extended one.
Currently we are achieving it through d3.js, but that requires lot of complex coding
Sarvagya shared this idea
Thanks for your suggestion, we do have this study that includes a subset of chord diagrams: http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/samples/highcharts/studies/circle-relation/
William Hawker commented
@Torstein Hønsi could this be made an extension of Sankey charts?