USDJPY SELL PROJECTION

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?

How to choose a platform, can copying or calling orders really make money?

In trading, how to solve the problem of being hit by the market back and forth with stop loss? What is the basis for the solution?

How can I have the ability to make stable profits?

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