Hello Erik,
Thank you for writing.
You can enable selection in
RadChartView and detect the clicked data points:
RadChartView | Selection.
Handling clicks on the series is, however, more tricky. A similar question has been discussed in the following forum thread:
http://www.telerik.com/forums/how-to-select-a-series.
Regarding the legends, you can handle the MouseDown event of your chart and assign a particular context menu depending on the clicked element. Please check my code snippet below:
I hope this helps. Should you have further questions please do not hesitate to write back.
Regards,
Hristo
Telerik by Progress