Trading courses and coaches are useless- true or not

What do you think is the most important thing in trading?

What is the essence of trading profit?

In the past few months, I feel that the more I study, the more I study, but it will decline. Sometimes I feel conflicted. I don’t know why?

In trading, how to solve the problem of being hit by the market back and forth with stop loss? What is the basis for the solution?

What pitfalls do you need to avoid when interviewing for a job in the financial industry?

Everyone is asking traders' questions,Let me ask, if you apply for a job related to this industry, what should you pay attention to? Is this idea advisable? Are there any hard conditions for applying?If you have experience, please help me~