Beginner - Get X value of a graph by one click

[Oliveira]

How can I get the X value of a graph clicking on it?

I have a waveform chart and I want to get the X value when I click on it. I tried to use some node' properties, but the only value that I get was the position on the graph displayed. Not the position relative according the displayed x axis range. Could somebody help me?

Thank you in advance.

[Oliveira]

Explaning: I want to do something like demonstrated in the image attached. When I click, I get the right value for the X and Y axis.

Thank you in advance

[Oliveira]

I am using a wave form chart.

[Oliveira]

There is a method in invoke node, called map coordinates to XY, that we can get this information.