profit gang

Can retail investors make a lot of money by trading? How can I earn it?

If you want to make money in trading, what principles do you need to understand?

How do you view the theory that review is useless?

What cognitive biases do we have to overcome?

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?