All positions green on the day...

Every position, long or short, is profitable at the moment (for the day at least). What are the odds of that? Actually, very good. You will notice, either A. all positions will be down at the same time, regardless of long or short. Or B. all positions will be profitable at the same time, regardless of biased direction. It is rare that I have a mixed bag on any given day.

Being long, or short, is not near as important as how you manage the trade.