Modify and Cancel Orders

State-changing operations must prevent duplicate submission.

Modify Order

Operation

TradeApiService.MODIFY_ORDER = modify_order. Uses server method modify_order.

Request

TigerRequest<TigerDictResponse>

ModelValue: ModifyOrderModel.

Parameters

SDK property	C# type	API field	SDK default	Required	Constraints
`Lang`	Language	`lang`	None (omitted if not set)	no	—
`Account`	string (nullable)	`account`	null	Auto-filled if empty	TradeClient uses DefaultAccount when empty
`SecretKey`	string	`secret_key`	null	no	—
`Id`	long	`id`	None (omitted if not set)	Required	—
`OrderType`	OrderType (nullable)	`order_type`	null	Optional	price fields are conditionally required by order type
`TotalQuantity`	Int64 (nullable)	`total_quantity`	null	Optional	—
`TotalQuantityScale`	Int32 (nullable)	`total_quantity_scale`	null	Optional	—
`LimitPrice`	Double (nullable)	`limit_price`	null	Optional	conditional order-price field
`AuxPrice`	Double (nullable)	`aux_price`	null	Optional	conditional order-price field
`TrailingPercent`	Double (nullable)	`trailing_percent`	null	Optional	conditional order-price field
`CashAmount`	Double (nullable)	`cash_amount`	null	Optional	—
`DisplaySize`	Int64 (nullable)	`display_size`	null	Optional	—
`MinDisplaySize`	Int64 (nullable)	`min_display_size`	null	Optional	—
`PriceType`	string (nullable)	`price_type`	null	Optional	—
`CheckIntervals`	Int64 (nullable)	`check_intervals`	null	Optional	—
`StartTime`	Int64 (nullable)	`start_time`	null	Optional	Timestamp or date format; maintain chronological order
`EndTime`	Int64 (nullable)	`end_time`	null	Optional	Timestamp or date format; maintain chronological order

Return

TigerDictResponse inherits TigerResponse; its data property is dictionary from string to object. Key SDK fields: dynamic fields.

Example

TigerRequest<TigerDictResponse> request = new()
{
    ApiMethodName = TradeApiService.MODIFY_ORDER,
    ModelValue = new ModifyOrderModel { Account = tradeClient.GetDefaultAccount, Id = 1234567890L, OrderType = OrderType.LMT, TotalQuantity = 1, LimitPrice = 200.0 }
};
TigerDictResponse? response = await tradeClient.ExecuteAsync(request);

Response type

Dictionary<string, object>? data = response?.Data; // null when response or data is absent

Response Example

{
  "code": 0,
  "message": "success",
  "timestamp": 1785528000000,
  "data": {
    "id": 123456,
    "orderId": 789012
  }
}

Cancel Order