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What would you say to yourself if you went back to your first day in trading?

A handful of bitter tears, I have been trading for five years, and I still lose money, what should I do?

What do you think is the most important thing in trading?

Winning ratio and profit-loss ratio, which one do you value more?

My usual trading system continues to fail, what should I do?

If a trading system built by myself often fails and causes losses, should I abandon this system and replace it with another one? Is there a stable and profitable trading system?