The documentation is a little vague
on this issue.The XValue property corresponds to the horizontal "X" position in Axis scales of the current cursor position.
It seems the XValue corresponds to the first item in the series with a specific value IOW if I have 5 items with the value 100 in 2000 nodes, it selects the first one and everytime the chart is reloaded, the Cursor Tools X line is in a different location (based on different data being loaded).
The goal is to show the user the cursor tool as opposed to it hiding on top of the Y Axis line.