If price rises above the line (breaks out), buy.
If price drops below the line, sell or short.
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Your precise entry will depend on how afraid you are to (a) enter and (b) manage the trade. This in turn will depend in part on how well you have addressed price risk, information risk, and opportunity/time risk. If you haven't addressed your fears regarding risk at all (and your emphasis on "precision" suggests that this is the case), then you should postpone trading until you have done so.
As for "noticing it", you will not notice price' rising above resistance unless you're looking at it. However, you can if you must place a stoplimit buy entry above the line and let your platform take care of it. This carries its own risk, which you must also address.
Unless and until you come to terms with risk, the potential reward is entirely irrelevant.
I'm asking how you do it, it's your method.
Can you please use your preferences as answers?
For example.
Is a tick s/r line violation considered a breakout in your case ?
Let's use you as a case for answers so I can understand better your ruleset in grey areas.
Thanks