I do not know what your point.
To me, If I have a 3k account, and trade 1lot ES, that is a suicide trading. if ES against you 50 point, you are gone. but my account is 100k+, I even do not look it at all, how about 200points, just piece of cake, nothing scared me!
so I do not lose in any single trade last year in ES, Inot brag itat all! just common sense
I do not need be so accurate, 100point accuracy is ok, even 200points.timeaccuracy canbe as wide as weeks or months. and I still cantrade other stuff!
if your account is just3k, you need higher accuracy maybe just several points. if a person never shoot, let him shoot, 80%~90%most time he shoots wrong place,how can let a baby shooter shoot ataccuracy of 0.1centimeter diameter target from 1000feet away, even the well trained topgun can not! but if you put a big target, for example, a football field from 100feet, you just need shoot, almost 100% hit the big target.
that is why I never use stop loss, I do not need it any more. glad I am not a small retail trader any more.
as for statitic edge, forget about that. only you have big account, you can play that statistic game.
I don't think "more room" to be wrong leads to long term success. 90% of the trades I gave more room to, failed and the reason I gave them more room was because they weren't working and I didn't want to cut the loss and be proved "wrong".
Losing trades are necessary for optimal results in a positive expectancy system. As the OP knows he will lose on average 35% of the time. If he tries to avoid those losses he will likely lose all his capital due to commissions and slippage alone because he's unlikely to attain a better result by trying to outsmart a winning system that is derived from a random distribution of wins and losses that define his edge.
http://www.cornixtrading.com/2012/07/rats-vs-yale-students-randomness-psychology/
Trading is not a sprint, it's a game that unfolds over time and involves far more than a straight run at the goal. Watch a game of professional soccer (football) and you'll notice that it takes a lot of backpassing to get to the goal.