Theoretically, it is difficult to achieve long-term stable profits in the short-term within the day

Because it is greatly affected by time and spreads

Facts have proved that long-term stable profits are The only rule is to lose small and win big

Another problem is the definition of short-term. Short-term may be multiple orders within a day, one order a day, or one order a week.

I am a short-term trader during the week, placing one order per week. Facts have proved that I can make stable profits.

I will also answer your supplementary questions

You are right, everyone has their own trading rules, and these rules are unique. Since this rule is the only one, you don't need to search for God. What you need to do is to truly understand yourself. Only those who truly understand themselves can truly understand the market and develop a trading system suitable for their own operations. What we trade is actually our own trading system or trading philosophy, not the market, because no one can fully understand the market. Since we cannot fully understand it, our understanding of the market is one-sided, no matter how much you think you understand. Deep down, you are all one-sided, and one-sided is one-sided. There is no distinction between more one-sided and less one-sided. This is why many veterans who have been doing it for many years will not make more money than novices. Anyone who tries to fully understand the market is being smart and is going astray. Great traders are unknown, just like Sun Tzu said in The Art of War: without wisdom or courage, because he himself understands that his victory is inevitable. The same is true for the trading industry, but only a very small number of people can do it.