Don’t be an iron-headed kid anymore—go heavy on bets and you’re doomed; always going against single trades means you’re doomed too. Only use light positions to trial-and-error: when you’re wrong, cut losses without feeling bad; when you’re right, hold and add to your position with floating profits, compounding again and again. The prerequisite is that you know how to do the math—how much profit should you add for. Otherwise, one pullback will wipe out all your profit, turning gains into losses. Give yourself a bit more margin for error. Don’t mess with your own money. Trading is a business, not gambling.