The main causes of failure for forex traders include lack of discipline, inadequate risk management, emotional trading, overtrading, and insufficient knowledge or experience. Other factors such as unrealistic expectations, poor trading strategies, and lack of a trading plan can also contribute to failure. Successful traders are able to manage risk effectively, maintain discipline and patience, and stick to a well-defined trading plan. They also continuously educate themselves and adapt to changing market conditions. Avoiding the common pitfalls of forex trading and focusing on building a sustainable and consistent approach can help traders achieve long-term success.