I backtested right here on trading view , and just kept a log on excel. I only backtested Bats and Gartleys and so they are the only patterns that I actively use, but I will soon be back testing Butterflys and come up with some rules for trading them.
Trade should have looked more like this. Have been studying the use of these "inner" trend lines more and more lately (blue line), coupled with the fact that price likes to extend beyond an impulse point but usually fails by the 1.27 extension if its going to reverse. (Or close above the 1.27 if the trade is flat-out wrong).
Approach the game the correct way. Always taking notes , always learning, always improving. Cheers.