No trading strategy becomes strong without mistakes. But the main thing is not to avoid them, but to understand what exactly went wrong and not to repeat it a second time.
One of my most indicative mistakes was exiting a proven strategy due to emotions. When it seemed that the market would "turn back," I changed the plan on the fly. The result was not only losses but also a loss of confidence in my actions.
Another lesson is that too many indicators do not help. They create unnecessary noise. Now I adhere to the principle: less is better. One tool that I understand deeply is more effective than five that confuse.
The most important thing is to keep a trading journal, recording not only the numbers but also my state: why I opened, why I exited, what I felt. This helps to grow systematically.
Every mistake is an investment in experience. And when you learn not to run away from it, it becomes your strength.