By default, entry orders are submitted to your broker with extended hours disabled. By checking the Allow entry extended hours checkbox in your strategy settings, you can enable extended hours trading for your entry orders.
When this setting is combined with an Entry order type of Market, the entry order will be submitted as a market order when the market is open and an extended hours limit order when the market is closed.
Alternatively, you can use the extendedHours parameter in your webhook request to explicitly control whether extended hours trading is enabled for your entry orders. Whenever you send a value in the extendedHours parameter, it will override the strategy setting.
{
"ticker": "AAPL",
"action": "buy",
"orderType": "limit",
"limitPrice": 100,
"extendedHours": true
}