Chart Tooltip Formatting

As per the documentation tool tip will show series data value for a column, so if we want to format tool tip we need to format the data, please find attached screenshot of forum documentation

I've tried passing in formatting rules (dollar() for example) into the columns data parameter, but unlike data grids it doesn't appear to take.

I agree with you, seem's to be we can't format the tool tip data, I've tried using hard coded values something like $50,$60.. but tool tip is showing only 50,60...