If I am not mistaken, the "zones", "alerts" and "ranges" have to be hard coded values.
A good enhancement would be to make them data-driven.

I want to introduce Visokio to one of my clients and they record their suppliers performance. Obsviously, one of the best way to show the supliers performance is to use a dial view (or a radar view for which I posted another enhancement request). But the issue is that the zones changes depending on the category or subcategory the supplier is evaluated for. Hence this enhancement request.