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

Is there a future for giving up your studies and doing business?

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

What is a perfect trading system? Or is there a so-called perfect trading system?

I have been unable to set the stop loss in the transaction, how can I do a good stop loss?

What is the essence of trading profit?