Most traders cannot define in words why they put a support zone here and a resistance zone here. So what they're saying is that they are good car drivers because sometimes they stop at a red light and sometimes they go through but so far they have not been killed.
This doesn't mean that these zones do not help you in TA but unless a consistent and rational method is used to find these zones they are not relevant, they are random.
Once you have found or devleoped a set method, demo it and back-test it and trial it until you have your own tactical rules.