Futures market usually does not have the concept of "one-word board", which is mainly applicable to the stock market. In the stock market, the word board refers to the ups and downs of a stock in a day's trading. The daily limit is to stop trading after the stock price rises by a certain percentage, and the daily limit is to stop trading after the stock price falls by a certain percentage. In the futures market, commodities are traded in the form of contracts, and there is no limit to the price limit. The price of futures contracts will fluctuate according to market supply and demand and changes, and there is no fixed daily limit or daily limit. Therefore, in the futures market, the range of price changes is usually more flexible and diversified.