Conditional formatting using dynamic thresholds

Hello experts,

I am looking for a way to implement dynamic thresholds in conditional formatting. Currently I am only able to input static values when creating formatting rules. In other words I would like to have the thresholds defined by a cell value somewhere in my workbook instead of a static value. My users require specific formatting for each line specified by certain logic.

I know this is possible using standard Excel functionality but I would like to do this using AFO as the crosstab is modifyable by the user.

Is there any way to do this? Or should I look at defining Exceptions in the BEx Query Designer and use user exits to put the business logic in?

Thanks, Dirk