券商 API订单 訂單查詢 未成交訂單未成交訂單 GET /openapi/broker/trade/order/open • 功能說明：分頁查詢當前待處理訂單列表。 Request Responses200401417500OKUnauthorized: Authentication requiredA business logic error triggered when the request cannot be processed due to domain-specific constraints.Internal Server Error.