But on the other hand, having a losing trade long time is not necessary a bad thing if it goes according to trading plan. Like lets say somebody has a system with stop loss of 100 and aiming for > +600 winners. Then, even if the price gives this trader a negative floating result long time it does not matter because it is still going totally according to trading plan.
I do agree with your initial suggestion that holding time is better, but just saying that holding negative trade does not necessary mean bad.
Freedom is a paradox; To be free to play beautiful music, you have to submit to the rules of music.