Is it a must to use indicator in your trading strategy?

The market often has some good and bad news, how should we generally treat it?

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?

As a "trader", what trading discipline do you have to restrain yourself?

A handful of bitter tears, I have been trading for five years, and I still lose money, what should I do?

I resigned yesterday, due at the end of the month, I want to do trading full-time, but I don’t know how far this road can go?