The DXY, Where to HTF?

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

How to effectively find the entry point?

Why do really successful traders never share their methods or strategies?

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?