$FOLKS I mentioned this morning that 39, 40, and 41 can all be placed as orders. I just made a profit once already, and this time I made a profit again. I placed an order at 39.5 and another at 40.5, and in the end, both were executed. Because sometimes a one-sided market does not necessarily mean it is faster to make money than this kind of market, in fact, the back-and-forth can make money faster. This is one point; you need to learn to place orders in advance.