Fennel allows you to place market or limit orders. A market order is an order to buy or sell a stock at the markets best available price, but does not guarantee a specific price. A limit order is a type of order used when someone wants to buy or sell a stock at a specific price (or better). For example, if a person places a buy limit order at $100, that transaction will only be executed if the stock hits the limit price ($100) or lower. Conversely, a sell limit order may only be executed at the limit price or higher.