One trade is meaningless. The profit from today will dwindle away if you hold out for runners every trade. I've tested a lot of different exit strategies over a very large sample size, pretty much everything you hear about in the usual places. All I found was a shifting of the distribution of returns, not a change in expectancy. Altered distribution can be a good thing from a practical or psychological perspective, but it comes at a cost if it increases the number of trades. I think the takeaway is that the reason for an exit is just as important as the reason for the entry. If you have the skill to id important levels like you say, you should use them 100 pct. Anything but alpha is just playing with probability vs payoff.
