based on MQL5 reference:
when using CopyBuffer, CopyHigh, CopyOpen, CopyClose, CopyLow, CopyTime, CopyRates, etc.
No matter what is the property of the target array - as_series=true or as_series=false,
Data will be copied so that the oldest element will be located at the start of the physical memory allocated for the array.
So the question is : What’s the use of ArraySetAsSeries anyway ?
since all copy functions ignore the as_series state of target array