'Yes' re MA's, MMA's, RSI's, STO, head & shoulders etc, in my opinion. 'No' re using something the crowd don't use. But TA for traders is better than FA (fundamental analysis or F*uck All). Choose your own poison, it's a free world and no one is forcing anyones opinion here. But when I hear strident opposition to TA, usually the first thing I think of is Surf & Cold (a poster from way back). Both these guys were anti guys, hated stuff with a vengance, that's because in their ignorance they got burnt but instead of learning, decided to become haters.
Tru dat. I am not a believer in the traditional use of RSI's, but I do use them for measuring volatility. Hence for example why it can be said traditional TA is rubbish, but if you go unconventional, TA can be made to work. In trading one needs to think outside the square. Where the crowd is, a trader needs to go a different direction.
I don't know about unconventional but adding basic maths to TA in general will make huge improvements, the hedges are already doing it whilst us retail are expected to be suckers for the usual gunk.