There are three kinds of locks, but it is clear to you that retail investors do not have to lock them. After locking, how to unlock it is a difficult problem. But it is completely different for the bookmakers or the main players who want to control the market. For example, the main force will be short, he must first open a position, and at the same time be long and short. After the opening, he will throw out a large number of orders at the right time, which will make the price fall and generate profits. After the price reaches the target, set multiple orders to lock in profits. These things are simple to say, but in fact they are very complicated. If you look at many contracts with hundreds of thousands of positions on the surface, it is possible that most of them are made by bookmakers for retail investors, from which you can realize the difficulty of making futures. These operations are sometimes visible and sometimes invisible in the market. Very elusive. Good luck to the novice.

As for knocking, it is relatively simple, that is, the banker will eat it back after hanging the order (not withdrawing the order). I don't think there are thousands of pending orders on it. First, there are many rich groups, and thousands of hands of money are nothing. Second, some bookmakers open their own futures companies without any handling fees. Then they are all internal cooperation transactions, and there is no handling fee. Have you ever heard that the exchange is afraid of bookmakers? It is said that many such things have happened before, and these bookmakers themselves are the "pillars" of the country, so let's not talk about it. You got it?