IF 90% of traders lose money, I have to ask myself, "Why?" Even if the number is at 80%, I do think far too many (myself included at the beginning) would read a book, memorize a pattern, and try to apply it. It wouldn't work 8 out of 10 times, and confidence is weakened. It's nice to have a reason why something works or doesn't. Oh, I bought the MA cross with Inverted H&S, P&F triple spread top breakout on high volume, close above pivot, and through the 200 ma. Did it work? No. Oh. But sounds nice.
Read the books, but remember that you are really stuff that won't work. So when you see a H&S, look to fade it. This will help more often than not.
Most money managers spend very little time looking at charts. They run analysis, take long positions, build portfolios, and half the bonds they buy don't even have price patterns like a stock chart.