%%I always thought averaging down meant adding to a loser regardless of direction (long/short). And averaging up meant adding to a winner, i.e., adding more units on rising prices on a long and vice versa on a short.
I STILL think it mostly means that;
but big differences in the way its done.
AUM long managers could average down a lot on a single stock + may get by with it, since paid on gross AUM .
But even on a trade, could be wise, if it cant clear, say 200dma , on a short or inverse ETF; it can be a part of a battle tested plan= better than putting it on ALL @ once.
Assume a time stop or another stop loss here+ i'm not talking on this trade with stupid stuff like never cutting loss. Part of a plan.
Averaging up makes even more sense on a big winner; even though largest is on @ reversal.
Even on a inverse ETF daytrade i see no advantage try in to put it ALL on @ once; but i seldom use 1 minute chart+ dont trade mainly off bid\ask.

