I have to agree, an integral part of my approach is to increase position when in drawdown, in fact I welcome the drawdown with open arms, more profit potential. It all depends on how you trade, if I was taking an outright directional bet though I would not increase size as you are carrying open risk.you got it backwards, not decrease, but increase. Anyway, to put an end to this, the correct answer is, it depends on the system.
Cheers John