DATA SOURCES AND VENDORS

Today there are a great many sowed from which data may be acquired.
Data may be purchased from value-added vendors, downloaded from any of several exchanges, and extracted from a wide variety of databases accessible over the Internet and on compact discs.
Value-added vendors, such as Tick Data and Pinnacle, whose data have been used extensively in this work, can supply the trader with relatively clean data in easy-to-use form.
They also provide convenient update services and, at least in the case of Pinnacle, error corrections that are handled automatically by the downloading software, which makes the task of maintaining a reliable, up-to-date database very straightforward. Popular suppliers of end-of-day commodities data include Pinnacle Data Corporation (800-724-4903), Prophet Financial Systems (650-322-4183).
Commodities Systems Incorporated (CSI, 800.274.4727), and Technical Tools (800-231-8005).
Intraday historical data, which are needed for testing short time frame systems, may be purchased from Tick Data (SOO-822- 8425) and Genesis Financial Data Services (800-62 l-2628).
Day traders should also look into Data Transmission Network (DTN, SOO-485-4000), Data Broadcasting Corporation (DBC, 800.367.4670), Bonneville Market Information (BMI, 800-532-3400), and Future Source-Bridge (X00-621 -2628); these data distributors