The return value is a number in YYYYMMDD format and is the date on which the entry occurred (not the EntrySetup signal day).
For a non-daily BarSize strategy, this will be the actual entry date (e.g. a Monday if Weekly).
If used as Combined(EntryDate) when multiple positions are open in the same symbol (whether due to pyramiding or multiple strategies), the most recent entry date for that symbol will be returned.
