Moreover, i also discovered that almost all the indicators work best on the long timeframe like weekly or monthly timeframes. If you want making trading decisions with peace of mind? trade only on those timeframes with any indicator and you will make money.
What that matters is what trader are you.
Scalpers will prefer to use the 15 minutes candles instead. But day traders will prefer the 4 hours candles. Swing traders will prefer the 4 hours to a day or 1 week candles. Holders will prefer the monthly candles also.
Actually, whether the timeframe of the indicator is 15 minutes, 30 minutes, 1 hour or 4 hours and 1 day depends on whether you understand the indicator well. Now I have a 15 minute indicator but I can't really predict which direction the candles will go next. For those who can predict the indicator correctly, a 15 minute, 30 minute or 1 hour indicator will bring good results on the trading platform. The trading platform does not seem very easy to me. The trading platform is very difficult but if you can gain experience in trading, trading will be easy.