For instance,I need to get the highest price in the past 75 minutes on the current chart .
I used the following codes to get it, but it did not work well, because there are always some bars missing,especially on M1 charts.
iHighest(NULL,0...) will only have you in the past 75 minutes if you run on the 1 minute chart. On the hour chart you get the last 75 hours
Change the 0 to 1