The fluctuation range is an index used to measure the degree of market price fluctuation, which is usually expressed by the difference between the highest point and the lowest point of price fluctuation in the same commodity market. There is a certain relationship between the price difference and the fluctuation range.

Among them, the price difference is directly proportional to the fluctuation range. When the price difference is greater, the fluctuation range will be greater, on the contrary, the fluctuation range will be smaller. In the futures market, the fluctuation range can be used to judge the fluctuation of futures varieties. When the futures market fluctuates greatly, it will bring greater risks to investors and may also bring greater benefits to traders. Therefore, in the futures market, investors tend to choose futures products with large market fluctuations as investment targets.