There are an infinite number of different ways to manipulate price and/or volume data to form technical indicators. The idea that any academic study looking at a necessarily tiny, tiny subset of the infinite number of indicators can reasonably conclude that "TA doesn't work" is laughably ridiculous on its face. The TA that is known to work is rare and undisclosed to the public. Nobody is going to just hand it to you ... unless he's your dad or you saved his life or something similar. Looking for TA that works on this website is a fool's errand. You'll have to do your homework if you want TA to work for you.