Amateurs tend to be much worse at limiting risk, so while they can win bigger, their drawdown/losses tend to be much higher than the professionals, too. If you

Amateurs tend to be much worse at limiting risk, so while they can win bigger, their drawdown/losses tend to be much higher than the professionals, too. If you want to see how good a trader someone is, look at how much they lose in a bad market rather than how much they make in a good market.