As someone who has dabbled in this sort of thing for a few years, dived pretty deep, and begun my journey into quantitative analysis I can tell you that all TA is pretty much useless. There are fundamental mathematical reasons as to why, but in a nutshell there is no TA indicator (that I'm aware of) that is a leading indicator. You simply cannot use technical analysis to glean any useful information about the future.
That isn't to say that you cannot use mathematics to glean useful information about the future. The medallion fund exists. People are doing it. But you're going to have to get very, very good at very domain specific math involving statistics, signal theory, information theory and the like, it's much more involved than TA, theres a reason quants make 7 figure salaries, you're not making useful predictions drawing triangles on a linear price chart.
That isn't to say that you cannot use mathematics to glean useful information about the future. The medallion fund exists. People are doing it. But you're going to have to get very, very good at very domain specific math involving statistics, signal theory, information theory and the like, it's much more involved than TA, theres a reason quants make 7 figure salaries, you're not making useful predictions drawing triangles on a linear price chart.