When is technical analysis useful?

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gunner.21

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With respect to the efficient market hypothesis, when would technical analysis be useful to earn abnormal returns?
 
No, it never would. Weak-form efficiency says all past MARKET info (prices and volume, what Technical Analysis is based on) is already factored into the price. Semi-strong and strong both include market info as well, so TA is never useful (according to EMH).
Someone correct if wrong
 
gunner.21 wrote:With respect to the efficient market hypothesis, when would technical analysis be useful to earn abnormal returns?
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When nobody else is doing it, and there are lots of sheep in the market.
 
CFA’s stance on TA is that it never works. Some of the traders I work with use it a lot though.
 
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