Arbitrage charges unilateral margin. Generally, you do arbitrage and contact the company, and the company will inform Hongmajia to apply for arbitrage positions for your positions in the market. After the settlement on the same day, a part of the deposit will be released and only one party will be charged. This means charging the high bidder for cross-month arbitrage of the same variety. For cross-species arbitrage, it is charged according to the contract distance, and only the contract margin in recent months is charged. In addition, both legal persons and natural persons can carry out arbitrage, but natural persons cannot end arbitrage by throwing warehouse receipts in recent months into distant months, because natural persons are not qualified for delivery.