Depth of Market (DOM)

A measurement of the supply and demand for liquid and tradeable assets. Depth of market (DOM) is based on how many buy and sell orders are active for a certain asset, like a stock or futures contract. The market is deemed to be deeper or more liquid the more of those orders there are. Since it contains a list of pending orders for a securities or currency, depth of market data is sometimes referred to as the order book. Which transactions can be processed is decided using the information in the book. Most internet brokers offer DOM data at no cost or a nominal price.