Wonging only on loss
I've run one or two computer tests of this idea some years ago.
The theory being tested was that one is likely winning as the high cards are coming out; so only wong out when the TC is <= -2 and one of two things happens: (1) you lose a hand; or (2) the count stops dropping.
This does NOT work. It is only trivially better than not wonging at all.
One piece of advice: uses a ROUNDED TC for wonging purposes even if you use a floored or trucated TC for betting and playing purposes. IOW, wong out @ a TC of -1.5 or lower.