I think he wants to just consider particular bar for the calculation of an indicator.

MattY included 2 images, and the indicator is also calculated for some "flat" bars, this bars should be excluded in the calculation of an indicator.

For example lets say I just want to have the EMA from 8:00 - 16:00 UTC, that means every bar between 4pm and 8am is ignored in the calculation, is this possible?