DowJones Daily Chart 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?

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?

If you want to make money in trading, what principles do you need to understand?

Winning ratio and profit-loss ratio, which one do you value more?

More than 90% of the foreign exchange market is losing money, why don't you give up?