Similar to short selling, it is to grab a hat. Generally speaking, the way to grab a hat is to buy a financial instrument that is expected to rise at a low price, and sell it quickly when the financial instrument rises to the expected target; Either sell the financial instruments whose expected price will fall at a high level first, and then buy the same amount of instruments when the price of financial instruments falls to the expected price. So how does hat catching work? The specific method of grabbing a hat: 1 market-making, taking stocks as an example. Hat snatchers use the price difference of a stock to place orders at the same time between buyers and sellers, aiming at stocks with large trading volume but small price fluctuation. Buy a large number of similar financial instruments and make a profit after the price changes slightly, which is suitable for financial instruments with rapid price changes. Traders will generally establish large positions with greater liquidity, referring to small profits but quick turnover. 3 Enter the site when the system signal appears. When the risk/return is close to 1: 1, the position trader enters the market after the system signal appears. When the risk/reward is close to 1: 1, triggering the first exit signal, he leaves quickly. It must be remembered that the hat-grabbing strategy is suitable for short-term trading, whether it is basic financial instruments (such as stocks and foreign exchange) or derivative financial instruments (such as futures), it can be considered in short-term operations.