DowJones Daily Chart Signal

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

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

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?

Ask for advice on how to manage trading positions in order to achieve long-term stable profits?

Everyone talks about whether the news is bullish or bearish. Why does the market still go in the opposite direction?