Ive never seen this barindex, this might be the solution to my problems (?) would need to consult the holy PRT manual to see what barindex is and how to use it.

If it dosnt work im guessing i need arrays?

I have the same problem when trying to calculate “how many % the market has gone up”

Say you want to calculate how far up the market has gone since the Lowest low past 100 bars.

How can i calculate that? Same problem as with the fibb?