The Blue Owl
Endangerous Herbivore
I have no proof, but I am convinced TA has no predictive power. I think short term movements are random, in the sense that if you regard a chart as a pure signal (and by "pure" I mean you just look at the numbers, completely disregarding any other information about the company, current events, and the macro environment), no matter what TA would predict, it will do no better than chance when applied to many charts, many times.As someone trained in classical financial economics, I'm baffled by technical analysis. There is no support for technical analysis that I'm aware of in the academic literature. Is there any 'proof' that this is anything more than people trying to read patterns in clouds or chicken entrails?
The reason I believe this is that, whatever predictive power TA could offer, the many competing actors trying to capitalize on it will extract that information out of the signal immediately, leaving only the noise. I don't know how to explain it better, but it's really just the principle of arbitrage; from all the players out there, at least some will "see" the hidden info, and by acting on it, they will bring the system back to equilibrium.
This is not the same as the efficient market hypothesis (I don't subscribe to that one, either.) Again, what I said only applies to treating the chart like you would a signal from space, so to speak, with no regard to context. Confirmation bias and the tendency to see patterns in noise are two of the most powerful forces shaping the human mind, so I am not surprised many swear by TA. I think it has the same explanatory power as astrology (some people find that one useful too.)