The Importance of Knowing Your Trading Edge

As far as I know, many master traders will rely more on the sense of the market, how to cultivate this feeling?

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?

How to determine whether your trading style is short-term or long-term?

What should I do if I am about to liquidate?

How can one be called a qualified trader?