The disposition effect, a behavioural finance phenomenon, is particularly prevalent in Forex trading. It refers to the tendency of traders to sell assets that have increased in value while holding assets that have decreased in value. Here are strategies to combat this cognitive bias:

1. Develop a Comprehensive Trading Plan: A trading plan should be thorough, detailing when and why to enter or exit trades, and how to manage risks. This plan acts as a guide, ensuring decisions are made systematically rather than emotionally, helping to avoid impulsive actions influenced by the disposition effect.

1. Set Clear Goals and Limits: By setting specific goals and limits for each trade, traders can focus on objective criteria rather than emotional reactions. This involves defining profit targets and acceptable loss limits, which helps in making rational decisions about when to close a position.

1. Implement Stop-Loss and Take-Profit Orders: Stop-loss and take-profit orders are crucial tools in managing trades without emotional interference. These automated orders ensure that positions are closed at pre-set levels, thus helping to maintain discipline and prevent emotional biases from influencing trade decisions.

1. Cultivate Emotional Discipline: Emotional discipline is key in trading. Developing resilience against fear, greed, and regret is essential. Traders should focus on maintaining a calm and balanced mindset, which is critical in making objective trading decisions and avoiding the traps of emotional biases. 
2. Conduct Regular Trade Reviews: Regular review of past trades is beneficial for continuous improvement. By analyzing previous trades, traders can identify patterns in their decision-making, learn from mistakes, and refine their strategies. This reflective practice is vital in recognizing and overcoming the disposition effect.

3. Educate Yourself About Behavioral Biases: A deep understanding of trading psychology, especially behavioral biases like the disposition effect, is crucial. Education in this area can help traders become more aware of their subconscious biases and develop strategies to mitigate them.
4. Diversify Trading Strategies: Diversification in trading strategies can reduce the risk of heavy losses in any single trading method. Employing a variety of strategies helps in spreading risk and reducing the emotional impact of losses, which in turn can lessen the influence of the disposition effect.

5. Practice Mindfulness and Stress Management: Mindfulness and stress management techniques can significantly improve a trader’s emotional regulation. These practices help in maintaining focus and clarity, enabling more rational decision-making and reducing the influence of emotions on trading.

6. Use a Demo Account to Practice: Practicing with a demo account allows traders to experiment with strategies and refine their approach without the risk of real financial loss. This is an excellent way to test methods for avoiding the disposition effect in a risk-free environment.

7. Seek Feedback and Mentorship: Feedback from mentors or peers can provide new insights and perspectives. Engaging with a community of traders or a mentor can help in identifying and correcting biases, offering an outside view on trading habits and decision-making processes.

In conclusion, avoiding the disposition effect in Forex trading requires a blend of strategic planning, emotional control, continuous learning, and self-reflection. By understanding and implementing these strategies, traders can enhance their ability to make more disciplined and rational trading decisions.