Hi Ryan,
Thanks for contacting Syncfusion support.
We have prepared the sample based on your requirement. Please find the sample from the following location.
Sample: Crosshair_120958
Please refer to the UG link for further information.
http://help.syncfusion.com/wpf/sfchart/interactive-features#crosshair
Thanks,
Santhiya A.
Hi Ryan,
Thanks for your update.
We have achieved your requirement by customizing the ChartTrackballBehavior. We have prepared the sample based on your requirement. Please find the sample from the following location.
Sample: Crosshair_120958_(2)
Please let us know if it is not your requirement.
Thanks,
Santhiya A.