Psychological characteristics of professional traders in forex trading include discipline, patience, resilience, adaptability, and emotional control. They are able to stick to their trading plan, manage risk effectively, and maintain focus despite market volatility and uncertainty. They have a positive mindset and learn from their mistakes, using them as opportunities for growth and improvement. Professional traders are also able to handle losses without letting them impact their decision-making. They understand the importance of maintaining a work-life balance and take care of their physical and mental well-being.