Hi Lee,
We can set dynamic values for the fancy tooltip.
We have a event called TextFormat() of ChartFancyToolTipController class within which we can set dynamic values for the Fancy Tooltip. But this is available in version 7.2.0.1. So, check out the sample and if it meets your requirement, Kindly download our latest version.
Here is a simple sample to display both the X and Y values in the fancy tooltip and as well as to display the normal default tooltip. Kindly, get the sample from the following location.
Sample Kindly, let me know if it helps.
Thanks,
Manimala.