"The market" is just a set of order books. I don't find it weird that technical analysis work some times in some markets.

Fully systematic traders exist and make money. Efficient Markets Theory says they shouldn't, but they do anyway. EMH is probably written under stricter/ideal conditions though.

If one wants to take a systematic/technical analysis approach though, I would look at the entire universe of stocks, whereas use a fundamental approach in individual stocks.

But yeah. I'm just an amature. What do I know.