Price limit refers to the maximum intraday price fluctuation allowed by futures contracts. Quotations exceeding this fluctuation range are considered invalid and cannot be traded. The fluctuation range of wire rod futures contracts shall not exceed 5% of the settlement price of the previous trading day, and the exchange may adjust the fluctuation range of wire rod futures according to market risks. When a wire futures contract appears in the same one-way market continuously, the price limit adjustment and trading margin collection standard of the futures contract correspond to the following table: when the futures contract appears in the same one-way market on D3 trading day (that is, it reaches the price limit for three consecutive days), if D3 trading day is the last trading day of the contract, the contract will directly enter delivery; If D4 trading day is the last trading day of the contract, the contract will continue trading on D4 trading day according to the price limit and margin level of D3 trading day; In addition to the above two situations, the futures contract will be suspended for one day on the D4 trading day.