A successful trader is not tested by prediction ability, but by possessing three capabilities:

First, a system with positive expectation determines whether you make or lose money in the long run—essentially a probabilistic advantage, not right or wrong judgments.

Second, correct confidence and humility towards uncertainty—daring to bet while always admitting you could be wrong, so you neither overbet nor lose the ability to act.

Third, consistency in executing the system under pressure, ensuring emotions do not override the rules; otherwise, your edge will be destroyed by your own hand at critical moments.