Choose MT5 for its advanced features like more order types, economic calendar, and additional timeframes. MT4 is simpler and widely supported, but MT5 offers enhanced trading capabilities and analytical tools.
I personally use a platform that is based on TradingView but I have used MT4 and it is better, more simpler. To be honest, It does the work, so why use MT5?
Although MT5 has an advanced trading tool that supports more types of timeframes, supports multiple markets, however, I still like to use MT4, it's a light trading platform and convenient to use.