To be honest, each indicator serves a purpose. I am not sure which is the best, but they all work fine.
I use EMA 20/50/100/200 for determining trends, and I use two RSI the normal one and the stochastic RSI, for oversold signals and finding a good entry. These three are the best combination for me but take note don't just focus on these indicators because banks or big players out there know how retail traders do, so if you set an SL in an obvious area, they are going to take you out.
That's why you still need to do some more analysis and strategy to counter these whales; they are the ones who make huge price moves.
I sometimes check MACD to know momentum but MACD doesn't work well to me I stop using it I saw much falls signal on short time frame not good if you are trading in low time frame but its good for higher time frame.