Market price, more then likely on the bid or somewhere inbetween the bid/ask. Depends on the broker, wether they go for the best exchange or a specific exchange based on you're region (Being near chicago a lot of my orders flow through the CME). You really would have to ask them. Just give them a call and ask so you know for future reference.
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.