Discipline(Discipline)
The habit of executing your written plan regardless of the outcome. In trading, success comes from rule-based repetition far more than from correct predictions.
Discipline is a matter of systems, not willpower: clear rules, checklists, pre-defined limits and a daily review. A vague plan cannot be executed with discipline.
Process-oriented measurement (percentage of adherence to the plan) is a better indicator of progress than outcome-oriented measurement (daily profit).