How to build a reliable trend trading system? Let's discuss

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

Ask for advice on how to manage trading positions in order to achieve long-term stable profits?

Some people say: One point of trading depends on technology, nine points depends on emotion, what do you think?

The trading mentality is always demonized. It is true that the mentality will affect the order, but it is too exaggerated. Shouldn’t it be that one has strong technology to have a stable mentality?

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?

Seeking expert guidance, what is the difference between left-hand trading and right-hand trading?