No need to rush up because you would eventually find the indicator that would suit you out depending or according into
your needs.Usually when it comes to TA's then it would usually talk about.
1. Common Support and Resistance Lines
2. Moving Averages
3. RSI
4. MACD
5. Fibonnaci
6. Timeframe biases
It does depend on how you do mix up and make trade executions on this one.
I agree, these are the most common indicators that was used in order to do a technical analysis and yes it depends on your needs which indicators you will be using, using all of these sometimes is not helpful and would just give confusion, in my case I use moving average, RSI and MACD most of the time and of course the support and resistance line and trend lines.