Hi,
you can make charts clickable if you switch from page-builder interface to classic/text and do something like the following (at least with the nice torus charts 🙂 ):
<a href="http://www.your_url_here.de" target="_blank"><p style="text-align: center;">[chart percentage="10%" size="170" barcolour="#c11a37" trackcolour="#e4e4e4" content="icon-folder-open" align="center"]</p></a>
Note, that the icon or text in the chart-centre changes color according to the link colour of your choice in the general theme settings. You’d have to override it with inline css or a custom class attribute within the anchor-tag, if you don’t want that.
Greetings,
thosch