Strategy system setup very important for successful traders

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

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?

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

Seeking expert guidance, what is the difference between left-hand trading and right-hand trading?

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