Places a complex conditional order (OCO, OTO, or OTOCO). Only supported on certain brokerages. Please refer to the brokerage trading support page for details on which brokerages support complex orders and which types they support.

• OCO (One Cancels the Other): Two peer orders; when one fills the other is cancelled.
• OTO (One Triggers the Other): A trigger order that, when filled, activates a conditional order.
• OTOCO (One Triggers a One Cancels the Other): A trigger order that, when filled, activates an OCO pair of two peer orders.

Option OCO peers must trade the same OCC option symbol with the same closing action and positive whole-contract quantity.

On tastytrade, option OCO supports closing an existing long or short option position with one Limit order and one Stop or StopLimit order. Both PEER orders must use SELL_TO_CLOSE or both must use BUY_TO_CLOSE, with Day or GTC time in force. Opening option OCOs are not supported.

On enabled Webull US v3 accounts, option OCO supports closing an existing long option position with one Limit take-profit order and one Stop stop-loss order. Both PEER orders must use SELL_TO_CLOSE, Day, the same OCC option symbol, and the same positive whole-contract quantity. Webull receives these as STOP_PROFIT and STOP_LOSS orders sharing a combo ID, without a MASTER order. Opening option OCOs, BUY_TO_CLOSE, StopLimit, and other option order pairs are not supported on Webull. Equity complex-order behavior is unchanged.

{
  "type": "OTO",
  "orders": [
    {
      "order_role": "TRIGGER",
      "instrument": {
        "symbol": "AAPL"
      },
      "order_type": "Market",
      "units": 1,
      "time_in_force": "Day",
      "price": 31.33,
      "stop": 29.5
    }
  ],
  "client_order_id": "550e8400-e29b-41d4-a716-446655440000"
}

{
  "type": "OTO",
  "brokerage_group_order_id": "1234567890"
}