if i start with both bull and bear 2:1 ratio spreads - short positions striked ATM - and the underlying moves to either wing strike - is there any reason not to cash out the profitable short and reestablish it at the wing strike? if the underlying moves far enough, one of the shorts will go to zero, so i'm assuming covering early is a theoretically intelligent thing to do, just wondering if anyone has guidelines on how soon to make the adjustment.