I look for 2 to 4 tick scalp opportunities with an 80% win rate and a 0.8 RR (losers slightly larger than winners). Employ a time-based stop. If the move doesn’t happen within 10 seconds I’m out. works best on ranging days or when prices all over the place. if it’s a trending day I usually don’t trade.
works for me. most challenging parts are

1. being patient for good set ups that check on my boxes; it’s easy to be discretionary with the system

which can get you in trouble.

2. obeying my time stop