There are various website who offers free and comprehensive technical analysis courses for stock market trading like
EDX
Udemy
couresera
Zerodha varsity training.
These are some website which provide some technical courses free but its better to join some paid institute to learn better and technical analysis. There are various institute who provided theses type of courses like
NIFTY trading institute
National stock exchange it provide short term courses
Radical Institute of stock market,
Maheswari institute,
Arihant capital market,
Kalpataru Institute of capital market, etc.
sharemarketshiksha 