Usually when you are choosing longer time chart, confirmation you will be getting will be more stronger. Usually I do prefer to follow 4 hours chart because it will be giving very significant trend change and you will not get disappointments on small noises. Because, market will always fluctuate and when you are following smaller time frame then you will get misguided by any short-term fluctuations which may be leading into losses.

Other than time frame, you must follow combination of strategies so that you will get double confirmation which is more important than following any fixed time-frame chart.