Use of Rankx with a previously defined measure - possible?

Hi all, can I use rankx with a previously defined measure? E.g., essentially creating a measure of a measure?

My original measure references a table ("S") and calculates a volume variance by brand versus a previous month ("Measure X"). Now I'd like to rank those variances. Having difficulty - all values are returning as the highest or lowest ranked number (e.g., Brand A=1, Brand B=1, Brand C=1, Brand D=100, Brand E=100, etc.).

What I'm using follows.  Help?

Measure = rankx(all(Table S),Table S[Measure X],,asc)