Hi Andrew,
Yes. It is possible to get the position of a data point in two ways.
1) Using Maximum and Minimum values of Chart Axis and Right, Left, Top, Bottom values of Chart Area Render Bounds.
2) Using Chart control's Mouse Move event.
Please have a look into the sample attached.
Chart Styles.zipPlease let me know if you have any further questions.
Best Regards,
Sureshbabu