i think that if you are an intraday trader, then 15M, 30M, and 1H is the best time frame for you to trade with ...because you will be aiming at few trades on daily basis and also you can handle it well...but if you are not a day trader, and you are doing scalping, then 1M,5M and 15M are the best time frames for it and you can make a good profit with it...i am a scalper, so i prefer to use 1M and 5M time frames and it suits me the best....