I know, it has been often said by people, much brighter and more competent that I will ever be. The least important figure to look at are the Percentage Winner.
Personally I find it very challenging and difficult to follow a system – or even provide seed funding – when I have to expect only 3 out of 10 trades to be profitable. Nevertheless this system would have returned 3,5 % p.a. from 1/2009 – 1/2013.