Avoiding costly trading mistakes is crucial for success. #TradingMistakes101: Don't chase losses – averaging down can amplify losses instead of rescuing them. Resist emotional trading; fear and greed are your worst enemies. Overtrading thins your capital quickly. Proper risk management, including stop-loss orders, is non-negotiable. Thorough research is paramount; don't jump into trades based on hype. Finally, understand your trading style and stick to it – consistency wins in the long run. Learn from your mistakes and adapt your strategy.