As usual I disagree with the underlying premise of a lot of these comments.
It isn't win to loss ratio that matters, what matters is the size of the average winning trades compared to the size of the average losing trades. In short.. all that matters is MAKING MONEY long term. It's totally normal for forex traders to have a 40% win rate compared with 60% loss, for example ... but even "worse" win rates are perfectly capable of making piles of money, and high ratio win rates are perfectly capable of losing money. Stories of traders making a lot of successful trades then not being able to cut their losses on losing trades are everywhere on this forum.
My thoughts on all of this, however, go even deeper than that .. because of the varying time scales on trades and positions, it doesn't even make sense to talk about "win rates". You are ALWAYS in a position, even if that position is cash. If you wake up tomorrow in cash and the SPX has gained against $us, do you count that as a "loss" since you were on the wrong side of the $us/SPX trade ? If you were in SPX and "won" vs the $us, do you consider it a loss if the big mover of the day was commodities and the SPX lost vs commodities ? Is your "win" rate always against $us ? How about when the $us is losing so much that even a "win" on SPX vs the $us is a losing trade against forex because it really means that U.S. stocks fell vs foreign currency, is that "loss" in your win/loss ratio ? The whole idea, in short, is arbitrary as hell, and basically pointless.