When you buy a fixed-price call option and pay a small premium, you can enjoy the right to buy related futures. Once the price really rises, you will exercise the call option to get the futures long position at a low price, and then sell the relevant futures contracts at a high price according to the rising price level, get the profit of the difference, and make up the paid royalties to make a profit. If the price does not rise but falls, you can give up the call option or give it away at a low price, and the biggest loss is the premium. The buyer of the call option buys the call option because it is determined that the price of the relevant futures market is likely to rise sharply through the analysis of the price changes of the relevant futures market, so he buys the call option and pays a certain premium. Once the market price really rises sharply, he will get more profits by buying futures at a low price, which is greater than the amount of royalties he paid for purchasing options, and finally make a profit. He can also sell option contracts at a higher premium in the market, thus hedging profits. If the call option buyer is not accurate in judging the price trend of the relevant futures market, on the one hand, if the market price only rises slightly, the buyer can perform or hedge, get a little profit and make up for the loss of royalties; On the other hand, if the market price falls and the buyer fails to perform the contract, the biggest loss is the amount of patent fees paid.