Tooltip filtering

I've set up a page in my dashboard to work as a tooltip:

As you can see, the bar chart sorts the musical substyles based on the number of artists who practice those substyles. The line (or area) chart shows for each substyle its temporal distribution (the number of times per year that a given substyle appears).

Well, what I would like is to perform a filtering such that the thumbnail chart does not display all the lines (i.e. all the substyles) but only the one corresponding to the substyle on which the mouse cursor has landed. Would it be possible?

If you need more details about the data model, ask for them without any hassle. Thanks in advance.