Hi Kim,
We have our stars set to reflect demographic fit and flames for behaviour urgency. I left the relative urgency at the default, but I changed the Relative Score (stars) to static and set the 1/2/3 depending on what the actual score is. To be exact, our maximum demographic score is 70 (fit on all relevant demographics) so 3 stars is >65, 2 stars is 55-65, 1 star is <55.
Hope that helps,
Cheral