Hi Waleed,
Greetings from Syncfusion.
We have analyzed your query. We were able to reproduce an issue tooltip template is not working in smithchart and we confirm this as a bug and logged a defect report. You can keep track of the bug from the feedback portal below.
The fix will be available in our upcoming volume 1 main release which expected to be rolled out end of March 2020.
If you have any more specification/precise replication procedure or a scenario to be tested, you can add it as a comment in the portal.
Regards,
Srihari M