K-line Jianghu Academy: How to judge whether you can trade full-time?

Are you happy doing business?

There is no such question, so I mention it.

How can one be called a qualified trader?

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?

Why is it so hard for an analyst to be the best trader?

I have been unable to set the stop loss in the transaction, how can I do a good stop loss?