Conditional Formatting in Cube view on Annotation members

HI,

I am looking for an option to highlight text value in the cube view based on some condition.

I have combo box which has parameter which pulling value from one of the DIM
Member 1 = United States

Member 2 = Canada

Member 2 = Not filled

If its not filled then I want to highlight red. Is there any option. I tried using XFBR but seems like it run on specific data unit only