Process over outcome
Trader Psychology
Judge the plan, not the single result
A well-planned trade that hits its stop is still a good trade if the process was followed. A sloppy, rule-breaking trade that happens to win is still a bad trade. Judge the process, not just the single result.
Outcome-only judging breeds bad habits
Judging every trade purely by whether it won or lost pushes traders toward rule-breaking behavior that happens to work out short-term, like moving stops or oversizing, since a win covers up the bad process.
Sample size reveals the truth
Over a large enough sample of trades, a good process reliably produces good results. Over a single trade, anything can happen, a good process can lose and a bad process can win.