替代交易规则是指在债权人因对方重大违约解除了合同并为了获得与原合同相同的标的而与他人缔约的情况下,如果替代交易的价格与原合同相比不利于债权人,其可以请求债务人赔偿两个合同的差价。在判断系争交易是否为替代交易时,应考虑交易的时间、后来的交易是否与原合同服务于相同的利益等因素。为适当地保护债务人的利益,替代交易应当在债权人发出解除通知后的合理时间内以合理的方式进行。如果替代交易不合理,应将交易价格替换为合理的价格。如果没有可靠的根据进行替换,应根据市场价格规则计算损失。 Alternative trading rules refer to the obligor’s right to request compensation from the debtor if the price of the alternative transaction is not favorable to the creditor as compared to the original contract if the creditor lifted the contract for the other party’s material default and signed the contract with another person in order to obtain the same subject matter as the original contract The difference between the two contracts. In determining whether the transaction is an alternative transaction, the consideration should be given to the timing of the transaction and whether the subsequent transaction will serve the same benefit as the original contract. In order to properly protect the interests of the debtor, the alternative transaction should be conducted in a reasonable manner within a reasonable time after the creditor lodged a notice of discharge. If the replacement transaction is not reasonable, the transaction price should be replaced by a reasonable price. If there is no credible basis for replacement, the loss should be calculated in accordance with the market price rules.