That is hard to answer.
In term of does it work, yes it does. TA increase your chance of success to be more than 50%. Mine is 62% with over 10.000 trades for every quater. Do not expect TA give you a true shoot 100% accurate because it cant.
In term of long way, it does not depend only in TA but also on risk management and many other things. What I mean is the success not only come from TA nor the lost not only because of wrong TA anaysis.
Hope it help