I'm using proc tabulate to create a transition matrix. We are tracking customer movement amoung product categories (ie. the number of customers that stayed in the same category and moved to the others). We have previous data on the rows and current data on the columns.
I need to be able to highlight the cell where the row/column intersect (so the cell that contains the number of accounts that stayed in the same category).
Using the proc format approach allows you to control colours based on ranges of values. That doesn't help me in this case unfortunately.
Another thing to consider is whether this is the kind of report that could be done with PROC REPORT and CALL DEFINE statements. You can perform traffic lighting based on the value of some other cell with PROC REPORT.
Again, Tech Support could help you figure that out.