It just takes awhile to build up your account or the amount of capital under management. Proper leverage can be the key to your success and longevity in this business. Most traders who run into trouble have too big a trade on. Size influences your objectivity. Your main object should be to stay in the game.
Most people react differently when they're under pressure.
They tend to be more emotional or reactive. They tense up and judgement is often impaired. Many talented athletes can't cut it because they choke when the pressure's on. You could be a brilliant analyst but a lousy trader. Consistency is far more important than brilliance.