Drag Points
From Documentation
You can enable draggable-points for one or all series, then users can drag to move a data point in a chart:
DraggablePointComposer.java
private Charts chart;
...
//enable drag and drop for a specific series
chart.getSeries().getDragDrop().setDraggableY(true);
//enable drag and drop for all series
chart.getPlotOptions().getSeries().getDragDrop().setDraggableX(true);
Reference: Highcharts API Rerenence
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