Thanks for your update.
We have prepared a workaround sample based on your requirement. We would like to inform you that VisualDataEditing feature is only available for ColumnSeries, LineSeries, SplineSeries, BarSeries and RangeColumnSeries. Please find the sample from the following location.
I'm still having some difficulties with my chart.
I've created a sample application that demonstrate my problem.
If I choose to draw a chart of 100 points - drag and drop works great, but if I set the number of points to 1024 (for example) then drag and drop not working smoothly and you can see spikes between two overlapping points.
I want my application to allow the user to select even bigger number of points (up to a million) drag and drop needs to run smoothly without those spikes between two overlapping points and without using of a scroll bar to view all the points on the chart - all points must be displayed on the chart.
I guess that I'll probably won't be able to draw a chart of a million points and view all of them at once in a way that would look reasonably (like I'm viewing a chart of 100 points) so I'll need to convert points from the maximum points I can draw on a chart to a million, I just need to find that maximum value of points that I can draw.
Is there any way to make the chart of 1024 points to work like the 100 points? (Or maybe even with a bigger number of points?)
I really appreciate all the help.