An order that is placed in the market to be executed at a set price. If the set price is not reached in the market, this type of order never gets filled. It is wise for traders to use limit orders when the option contract has a wide bid-ask spread and/or low liquidity.
We do not provide a broker service nor do we allow logins to any brokerage services via API. We have a feature under development that will give you an order code for a specific ranked trade that can be used to execute the order with your brokerage of choice.