Best way to identify trend for beginners

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

Why are there so few stable profitable Huiyou? There are many liquidated and repeated losses? Is it really because of technical analysis?

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

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?

I resigned yesterday, due at the end of the month, I want to do trading full-time, but I don’t know how far this road can go?