I will repeat to you why your contract is often blown up, and will immediately pull back to the previous price after the blowup. In fact, about 90% of the exchange's contracts are eaten by the exchange itself, that is, when you open an order, it is the exchange that receives the goods, and you are trading against the exchange. The exchange has accurate background data, which can see the current user's long-short ratio, long-short volume, and long-short average price. Through the average price of holdings, it is possible to accurately pinpoint the point where 80% of users blow up. Of course, if you are a 10U God of War, you don't need to consider these issues. The big data of the exchange is cumulative data, that is, it will blow up 50-80% of the account to make a profit.
Between 19 and 21, the exchange often "pulled the line" because the number of contract players was huge and the amount was huge. If it relied solely on big data to pin the blowup, most of the players in the opposite direction would make a profit; then the exchange would pull the line to prevent players from operating or limit the flow to create the illusion of network congestion so that the players in the opposite direction could not close their positions and make a profit.
In 2020-21, because of too many times of unplugging the network cable, the network cable had to be unplugged almost every week, causing a large number of contract players to leave; at this time, the trading method was changed to use the one-second heaven and earth needle to trade. For example: you are doing a 20X short order near 20000, the liquidation line is 19000, the planned commission stop loss point is set to 19100, and the planned commission stop profit point is set to 21000. At this time, if the exchange chooses to turn on the heaven and earth needle mode, it will fall below 19000 in an instant. The planned commission has no use. You can only place an order, but it will not stop loss if it is smashed in an instant. The stop profit point is even more ridiculous and cannot be triggered at all.
Most players think that contracts are relatively fair guesses about ups and downs, but you change your mind and think about it. The top exchanges have an annual revenue of hundreds of billions. Do you think it is difficult for them to make a "big data" system? The exchange is an unregulated area, let alone contracts.
Will you still play contracts after reading this?