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Day trading market data is the current trading information for each day trading market. Market data includes information such as the current pricing information, and the current volume information (number of contracts). Day traders use real time market data (as opposed to delayed market data) because they need to watch their markets in real time.
Market data originally comes from the exchange that provides the market, but it is usually provided to day traders via their day trading brokerage. Some brokerages provide market data at no charge for active trading accounts, while others charge an additional fee, either for all of their markets, or for each exchange. Most day traders will use the market data that is provided by their brokerage, but some day traders will use market data from other sources instead of, or in addition to, their brokerage provided data.
If you are using one of the brokerages profiled in the day trading brokerage profiles, then you will have access to all of the real time market data, and all of the recent historical market data, for the markets that your brokerage offers, and you will not need any market data from any additional sources. If you do want to use additional market data (either as an alternative, or a backup), the following are some popular market data sources :
In addition to these market data sources, historical market data can always be purchased directly from the market's exchange, and is available is several popular charting software formats, as well as standard ASCII (text) format.
Further information about day trading market data, including a description of the different market data levels, and the trading information that each level provides, is available in the market data tutorial.
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