Best time frame for day trading

Hi all, what do you recommend as the best time frame on a chart for day trading, in particular forex? As I am using MACD & RSI combo right now, but would like the correct time frame to make it most effective? Moving from 1 min, 5 min, 1 hour and 4 hour as well as 1 day charts is self conflicting and just confuses me where I am trying to seek confirmation.

Any advice and recommendations welcome, thanks all.