[anamy]

Yep, you're certainly on the right track. Next you'd have to change

while (index != 4)

to

while (index != 13)

so it'll read the appropriate number of bars. Your setup would then be reading a total of 12 bars (starting on the previous bar which is 1) on the 5 minute charts instead of 3 on the 15 minute chart. I think 13 would be the right number, but don't quote me on that.