@arj,
You can bind mouse events to the chart container, and show the toolTip at the datapoint nearest to the current x-coordinate, by using the toolTip showAtX method. Please take a look at this JSFiddle for an example of the same.
If this is not what you are looking for, could you please brief us more about your usecase, so that we can understand it better and help you out?
—
Ananya Deka
Team CanvasJS