OrderID

Unique identifier for Order as assigned by sell-side (broker, exchange, ECN). Uniqueness must be guaranteed within a single trading day. Firms which accept multi-day orders should consider embedding a date within the OrderID field to assure uniqueness across days.

订单的唯一标识符由卖方（经纪人、交易所、ECN）分配。在单一交易日内必须保证其唯一性。接受跨日订单的机构应考虑在订单ID字段中嵌入日期，以确保跨日唯一性。