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

Why can you see the general direction right, but make a bad point in the transaction, and lose money instead?

Do you guys have any good suggestions to save novice Huiyou like me from taking some detours?

Fund management has always been a headache for me. May I ask you guys, how can I do a good job of position control?

What is the essence of trading profit?

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