I have included a few links that may help you:
Hope that these helps
Can you plz attach the workbook?
Somehow i dont see an attach button , next to @mention button. Attaching a print screen if this helps:-
Here i have calculated 2 calculated field.
1) Diff = [Q1 Budget]- [Q2 Budget]
2) Color By = IF ([Diff])> 0 THEN "Yes" ELSE "No" END. have tried this calculation both as dimension and measure but did not help.