If you can keep reading what I've written, it means you've surpassed 80% of people; another 10% haven't followed me, and 10% are other experts.
Many people's trades are sometimes like Du; when you're lucky and win a lot of chips, it doesn't matter whether you bet big or small, you'll win as if profits will take good care of themselves. At this time, you don't need to think too much, just quietly place your bets and win.
And when you're unlucky, even though you've lost a lot of money, it doesn't matter whether you bet big or small, you'll lose as if the lost money is continuously draining your luck. At this time, you also don't need to think too much; cutting your losses and leaving is your best choice.
I have always emphasized that profits should run freely (of course excluding the principal), and losses should be cut quickly to meet expectations!
When you concentrate but still can't focus on making a profit, it indicates that your approach is wrong. Humility in learning is necessary; learning has no end, and applying what you learn is crucial!