The Order Book is where trade orders are displayed.

• Prices in red are the current  Sell (Ask) order prices
• Prices in green are the current  Buy (Bid) order prices
• If you would like to offer a price that already exists on the Order Book, you can click the Buy/Sell Price and the system will automatically fill-in the price for you.

For example, in the picture above:

• The best Bid Price is:  $5890.5 with 150 contracts
• The best Ask Price is:  $5898.5 with 150 contracts

*If you are a buyer, you should check the Sell Price; if you are a seller, you should check the Buy Price.