Sorry, I am not completely clear. Can you pls give an example?

Say, for the following default set up:

BarZone=ET;
EndWeek = 51705;

BarOffset = 17*24; // so that the day ends at 17:00 ET.
BarPeriod= 1440;

what BarOffsets will be used by Zorro with NumSampleCycles = 4?

Since 'oversampling' makes bar resampling, then both PRELOAD and TESTNOW should have some influence on that - based on the description of these in the manual (and jcl's answer to my question: https://opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=483395#Post483395)..