MARKET ORDER
When you submit an order to buy/sell/cover or short a security, you are placing a market order. A market order is executed at the current market price of the security. When a trader places an order, it is executed as a market order unless the trader specifies otherwise (see: limit orders). A market order may be executed at a slightly different price than was quoted at the time the order was placed. This is due to supply and demand affecting the price between the time the order was placed and when it was executed. This is also known as "slippage."
COMMISSION
There is no such thing as a free lunch in Hollywood and the same goes for the Hollywood Stock Exchange. Commission is the amount charged to execute a trade. All trades made on the Movie Market are subject to a one-percent commission, with a minimum of 2 cents per share, automatically deducted from your portfolio.