Bollinger Bands, RSI and Average True Range is the only 3 indicators that I used. Combine it with some patterns like Double Top, Double Bottom and Head & Shoulders will make your trading more close to accuracy.
In my tutorial in Udemy. Having too much indicator will just make your trading worst since you will have too many variables to be considered which is very prone to error. Just use indicators and patterns that everybody use because if no one but you will see the indicators & patterns on the current chart then most probably it will not gonna succeed.
Remember that in trading, you win because someone is losing. So better to use info that everyone see and follow the trend.