Cancel Order

POST /api/v1.0/sim-trade/{acc_id}/orders/{order_id}/cancel

Cancel an unfilled order. Only orders with status=2 (Submitted) can be cancelled.

Parameters

Parameter	Type	Location	Required	Description
acc_id	string	path	Yes	Business account ID
order_id	string	path	Yes	Order ID to cancel
market	int	body	Yes	Market (from market_id in the account list)

Request Example

curl -s -X POST "https://webapi.moomoo.com/api/v1.0/sim-trade/80303779/orders/1270776/cancel" \
  -H "Authorization: Bearer <AccessToken>" \
  -H "Content-Type: application/json" \
  -d '{"market":1}' | jq

Response Fields

Field	Type	Description
order_id	int64	Cancelled order ID

Response Example

{
  "ret_code": 0,
  "ret_msg": "success",
  "data": {
    "order_id": 1270776
  }
}

Error response

HTTP status remains 200. A failed request returns ret_code != 0 and an error object.

{
  "ret_code": -3,
  "ret_msg": "invalid request",
  "error": {"code": "invalid_parameter", "message": "invalid request"}
}