The posibility to change data in an Chart
The possibility to change live data in a Chart, for example in a linear diagram you double click with the mouse on a plot and you get the y value and when you finished edit it, this triggers an event.
Maybee this feature already exists?
Yes it exists, see https://api.highcharts.com/highcharts/series.line.dragDrop.
If dragging and dropping is not what you want, you can use select or click events and run `point.update` after finished editing.