The market has begun to price in the potential for the Federal Reserve to raise interest rates. Furthermore, the ongoing war.

How to understand the phrase "the simpler the trading system, the better"?

What is the degree of simplicity here? Or the simplicity here is not what I thought, just use a few indicators, so what do you think of this sentence?

Are you happy doing business?

There is no such question, so I mention it.

How can one be called a qualified trader?

I have had a few positions liquidated recently, but fortunately the losses were not very large. I would like to ask everyone, is there any way to prevent liquidation? Is there any trading discipline?

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