I believe that what gives a lot of folks trouble is that they don't wait until the end of a bar to make their entry or exit. Yet when people are back-testing , they are only looking at the end of bars. Very important in my view to allow bar to complete on the time frame you are trading.
For example, in my view, it's probably best when trading the 5 min bar, to go off and do something and come back at 4 min 45 seconds and review. You will make mistakes by analyzing bars any earlier than 15 seconds prior.
Interesting how wrong I was there----The stronger resistance was 28 and we blew through 45 like Oklahoma.