React to click on points in line char

[LorVeg]

Hello,
I'd like to know if there's a way to respond to user clicking on points in a line chart.
The best I could achieve is to give the Chart widget a gestureStream and react GestureEvents, what I'm missing is data about the point clicked, I've just found info about the local coord in localPosition inside the gesture field, but don't know how to translate them to variables.

I need the event to eventually update other widgets on the same page, usign that data

Thanks everyone,
Lorenzo