You can, but you will still come up with the same answer. Going back to my previous example with the IYY and AGG, I showed that AGG is outperforming IYY. Because if this ratio is going down (current column is O's) this means that the denominator (AGG) is going to outperform the numerator(IYY).
IYY ---- = declining ratio (current column is O's) AGG
If you flipped the whole thing, you would get a current column of X's, and the numerator(AGG) would outperform the denominator(IYY), which is the same answer as before.
AGG ---- = rising ratio (current column is X's) IYY
Here is a chart:
And the previous chart:
Hope this makes some sense; maybe someone else could explain in a more simplified way.
Wow! Looks like I should have held onto my long. Grrr...