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Current open interest, the current contract open interest for this trading pair in the market, measured in USD rather than the quantity of the cryptocurrency, for convenience and uniformity. 1M represents a contract open interest of one million USD. How to form a contract open interest of one million USD? Just find two people to bet against each other; one is bullish and opens a position of one million USD, and the other is bearish and opens a position of one million USD. This way, the open interest increases by one million USD, not two million USD. These two are counter parties. The winners take the other party's money (mutual extraction of each other's funds). If the price rises by one percent, the long position gains 1% (can close at 101w), while the short position loses 1% (closing requires buying at 101w), and the contract open interest remains unchanged. Because one position has an actual value of 101 (earning 1w), while the other is 99 (losing 1w), averaging gives 100. Open interest does not change because of price increases unless new betting capital is introduced. Closing a position will lead to a decrease in open interest.