Is it possible to cancel more than one with an OCO order?

Is it possible to cancel more than one with an OCO order?
Ie. say I have 3 buy Call orders and if one of them gets filled then immediately the other 2 orders shall be cancelled.
Can this be done with an OCO ? Or any other conditional order? Of course timing is important the faster the better.

Can the following TDA API example be modified for the above requirement? :

Conditional Order: One Triggers A One Cancels Another
Buy 5 shares of XYZ at a Limit price of $14.97 good for the Day. Once filled, 2 sell orders are immediately sent: Sell 5 shares of XYZ at a Limit price of $15.27 and Sell 5 shares of XYZ with a Stop order where the stop price is $11.27. When one of the sell order fills, the other order is immediately cancelled. Both Sell orders are Good till Cancel. Also known as a 1stTrigger OCO order.

Code:

{
  "orderStrategyType": "TRIGGER",
  "session": "NORMAL",
  "duration": "DAY",
  "orderType": "LIMIT",
  "price": 14.97,
  "orderLegCollection": [
    {
      "instruction": "BUY",
      "quantity": 5,
      "instrument": {
        "assetType": "EQUITY",
        "symbol": "XYZ"
      }
    }
  ],
  "childOrderStrategies": [
    {
      "orderStrategyType": "OCO",
      "childOrderStrategies": [
        {
          "orderStrategyType": "SINGLE",
          "session": "NORMAL",
          "duration": "GOOD_TILL_CANCEL",
          "orderType": "LIMIT",
          "price": 15.27,
          "orderLegCollection": [
            {
              "instruction": "SELL",
              "quantity": 5,
              "instrument": {
                "assetType": "EQUITY",
                "symbol": "XYZ"
              }
            }
          ]
        },
        {
          "orderStrategyType": "SINGLE",
          "session": "NORMAL",
          "duration": "GOOD_TILL_CANCEL",
          "orderType": "STOP",
          "stopPrice": 11.27,
          "orderLegCollection": [
            {
              "instruction": "SELL",
              "quantity": 5,
              "instrument": {
                "assetType": "EQUITY",
                "symbol": "XYZ"
               }
            }
          ]
        }
      ]
    }
  ]
}

 

Update:

Extending the other example there (Conditional Order: One Cancels Another) to >2 items seems to be possible.
Will try that instead of the above one.

 

I submit 3 differing items in the OCO order, the server accepts it and creates an OrderId,
but when getting details of the OrderId it shows that it accepted only 2 items, discarding the item in the middle.
This means it seems not possibe to use more than 2 items.
FugIt!
Now I'm going to roll my own complex order type the way I like.
It will be slow, but at least it will work...

 

TDA API Support just confirmed that only 2 items are possible in an OCO order: