A question that's been asked many times on ET... "How do you make yourself do the right thing"? Relates to discipline. Many/most times traders are uneasy and have difficulty pulling the trigger (including stops)... fear of being wrong, fear of loss, uncertainty of outcome, et al.
I don't have the answer.
Man does not change easily unless there is usually some type of pain, fast change is actually real body pain, quick bolt of impact or electric certainly has changed my errors with wiring anything, LOL or not wearing thick gloves and using sledge hammer and nails. Very difficult for man to basically "give up control of oneself", cause when you design one's method, when you trade it, you are willingly giving up control of the now man in you, to who you were when making the system. Many lack confidence in their abilities of the guy who designs so "we" have intense mental responses to change when market is open. Pain of losing money is actually happy time for the brain, brain gets use to losing and helps you find losing trades. Am sure many get anxiety attacks when they are in a trade going their way and since it happens less often, brain giving many bad feelings of getting out. If you hang around long enough to be profitable, your brain actually helps you select better trades, but beginnings you see the real person within you and often times you see what you never knew existed.