The visual cues tab is somewhat limited, I suggest that you are using the text / background color attribute expressions for that instead:
Go to expression tab, open attributes by clicking on the plus sign next to the expression name in the upper left section.
Then select either text or background color and enter in the definition field something like (where YE has to be replaced by Your Expression, e.g. avg(Margin):
=if( YE<-0.05, Red(),if( YE < 0,LightRed(), if(Perc >=0.05, Green())))
Red(), Lightred(), Green() are functions returning predefined color values, you could also use RGB(R,G,B) to define your own.
Hope this helps,