EURUSD daily short signal

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?

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

Do you think EA will be a market trend?

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?

Tell me how hard you have worked to make money in trading?