TA is misunderstood for what it is.
The studies in question are NOT comprehensive or specific in their reach by studying individual methods of TA.
It works, it's a fact. How do you think these hedge fund managers are getting rich? Fundamental analysis? I don't think so. They use complex trading systems based on complex mathematical calculations and computer based predictions.
Read about people like this:
http://en.wikipedia.org/wiki/James_Harris_Simons
And Buffett has nothing to do with this discussion, he made his money in a different manner. There is more than one way to play the market.
You CANNOT trade using fundamental analysis. Do if you're a trader, what do you use? Trading is not gambling and it's not a random. So what do successful traders use?
There is a huge difference between you staring at a chart for RMBS and saying quad-top and a high-speed algorithm trader tied into dark pools front-running NBBO using sub-pennying, which is exactly where most of these "traders" (or, rather, traitors) make their money.
It's got nothing to do with analyzing movements of the stocks, per se, but everything to do of analyzing the movements of the NBBO and front-running the Bid/Ask sheets, or, taking split-second measurements of the NBBO to gauge queue volume and taking arb profits.
I'm sure you've got the prop trading desk to do that and the connections to the dark pools.
Sure, sparky, go ahead.
But of course, historical price movements (support/resistance levels) predicted Rambus would get a settlement from Samsung and knock the remainder down, right?
No, they didn't. They predicted some mythical movement in stocks based upon historical levels, which have no predictive value for long-term, or even medium-term movements.
Short-term irrationality can have some value in TA, however, profits are largely wasted by transaction (and time) costs and are eaten away by downside risk, which is exactly what TA doesn't adjust for. It is asymmetrical in risk/value propositions. Why? Because it attempts to predict the unpredictable, it is a feedback loop.
How have these guys made money? They've essentially cheated and have been allowed to do it since the decimilization of the markets. It's only gotten worse.