Cancel an order (WebSocket)

Send CANCEL_ORDER after login. Supply orderNo or reference; when both are present, orderNo takes precedence.

Arguments

Field	Type	Required	Description
`brokerClientId`	string	Yes	Account ID identifying the client account for the request.
`orderNo`	string	No / conditional	Provide orderNo or reference. If both are supplied, orderNo takes precedence.
`reference`	string	No / conditional	Caller-supplied reference; alternative to orderNo

{
  "action": "CANCEL_ORDER",
  "id": "req-003",
  "args": {
    "brokerClientId": "client001",
    "orderNo": "23818"
  }
}

{
  "event": "CANCEL_ORDER_ACK",
  "id": "req-003",
  "code": 0,
  "message": "success",
  "data": {
    "orderNo": "23818",
    "status": "0"
  }
}