Get Combo Trading Info

POST /api/v1.0/accounts/{acc_id}/combo_trading_info

Query available buying power and margin preview information for combo options orders. Not supported for JP brokers.

When to use

• Before placing a combo options order (order_class=MLEG), preview buying power and margin here, then Place Order.
• When modifying an existing combo order, pass order_id for a replace-scenario preview.
• Single-leg stock / options orders usually do not need this API; for single-leg size limits use Get Max Qty.

Path Parameters

Parameter	Type	Required	Description
acc_id	string	Yes	Trading business account ID.

Request Parameters

Parameter	Type	Required	Description
multi_leg_info	multi_leg_info	Yes	Multi-leg combo information.
price	string	Yes	Order price.
qty	string	Yes	Order quantity.
side	trd_side	Yes	Order direction.
order_id	string	No	Order ID. Pass when modifying an order.

Request Example

curl -X POST 'https://webapi.moomoo.com/api/v1.0/accounts/{acc_id}/combo_trading_info' \
  -H 'Authorization: Bearer <AccessToken>' \
  -H 'Content-Type: application/json' \
  -d '{
    "multi_leg_info": {
      "leg_infos": [
        {
          "leg_code": "US.AAPL230120C00150000",
          "leg_side": "BUY",
          "leg_ratio_qty": "1"
        },
        {
          "leg_code": "US.AAPL230120C00160000",
          "leg_side": "SELL",
          "leg_ratio_qty": "1"
        }
      ]
    },
    "price": "2.50",
    "qty": "1",
    "side": "BUY"
  }' | jq

Response Parameters

Field	Type	Description
option_buying_power	string	Available options buying power.
buying_power_decrease	string	Buying power decrease from this operation.
margin_previews	list[margin_preview]	Margin preview list.

Response Example

{
  "s": "ok",
  "d": {
    "option_buying_power": "50000.00",
    "buying_power_decrease": "250.00",
    "margin_previews": [
      {
        "name": "Initial Margin",
        "inc_value": "250.00"
      }
    ]
  }
}