The company takes risks for you, so it is better than your parents. Generally speaking, t+0 liter can make a profit or a loss, all in order to make more people become his customers to collect fees. They also encourage you to do short-term work to get more commission income. But shorting is just another way to make money, but it doesn't mean that you can make money anyway. For example, if you do it right, you will make money. If you want to make a big negative line for a long time and make up for the loss with empty orders, then come to another big positive line. You said whether to make money or not. If you can't hit the first time, do you have to hit the second time? You see, when spot gold fell from 1900, it didn't happen in one go, but it fell repeatedly. How to fill more empty orders? Fight both sides if you can do it right, and fight both sides if you can't. Finally, if you are afraid of the stock market being quilted, the stock market also has securities lending business. Margin trading only magnifies the benefits and risks, but does not fundamentally change the nature of speculation. Eat small fish eats big fish.