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if I want to move the point inside the chart shoud i use draggable function ? is the drag of a point supported?
You can overlay custom DOM on top of chart, please refer Chart with Image Overlay for an example on the same.
Dragging and updating the dataPoint is possible in CanvasJS. Please refer ‘Interactivity Example’ in Features section of our homepage for the same. Also please take a look at an example in out gallery on Draggable Column Chart.
can I also keep more points like D, F, G at the same time?
Yes, you can have as many dataPoints and legends as you want.