TradeStation Group Reports Monthly Business Metrics Plantation FL, August 6, 2007 –TradeStation Group, Inc. (NASDAQ GS: TRAD) today reported the following business metrics for the month ended July 31, 2007:   • 80,435 Daily Average Revenue Trades (DARTs)   • Total client assets of $1.6 billion (as of July 31, 2007)   • Average equities client credit balances of $537 million   • Average equities client margin balances of $90 million Year over year, TradeStation’s DARTs increased 32%, total client assets increased 9%, average equities client credit balances increased 7% and average equities client margin balances increased 27%.   Below in tabular format are year-over-year comparisons of those metrics on both a monthly and quarterly basis: TradeStation Securities Business Metrics   Jul-07 Jul-06 Jul-07 vs. Jul-06 Q3-07 QTD* Qtr Ended 9/30/06 Q3-07 QTD* vs. Qtr Ended 9/30/06 Trading Days 20.5 19.5 N.M. 20.5 62.5 N.M. Daily Average Revenue Trades (DARTs) 80,435 60,751 32% 80,435 58,457 38% Total Client Assets ($MM), end of period $1,634 $1,493 9% $1,634 $1,569 4% Average Equities Client Credit Balances ($MM) $537 $503 7% $537 $519 3% Average Equities Client Margin Balances ($MM) $90 $71 27% $90 $65 38% Additional information regarding the company’s business metrics can be found on TradeStation Group’s Web site at www.tradestation.com/aboutus/businessmetrics.shtm. * Q3-07 quarter-to-date (QTD) means results for the month ended July 31, 2007. About TradeStation Group, Inc. TradeStation Group, Inc. (NASDAQ GS: TRAD), through its principal operating subsidiary, TradeStation Securities, Inc., offers the TradeStation platform to the active trader and certain institutional trader markets. TradeStation is an electronic trading platform that offers state-of-the-art “direct market access” (DMA) or “direct-access” order execution and enables clients to design, test, optimize, monitor and automate their own custom Equities, Options, Futures and Forex trading strategies. In 2007, TradeStation was named, for the third year in a row, Best Futures Brokerage and, for the fifth year in a row, Best Direct-Access Stock Broker, Best Professional Platform and Best Institutional Platform, in Technical Analysis of Stocks and Commodities magazine. TradeStation Securities, Inc. (Member NASD, NYSE, SIPC, NSCC, DTC, OCC & NFA) is a licensed securities broker-dealer and a registered futures commission merchant, and also a member of the American Stock Exchange, Boston Options Exchange, Chicago Board Options Exchange, Chicago Stock Exchange, International Securities Exchange, NYSE ARCA and Philadelphia Stock Exchange. The company’s technology subsidiary, TradeStation Technologies, Inc., develops and offers strategy trading software tools and subscription services.  Its London-based subsidiary, TradeStation Europe Limited, an FSA-authorized brokerage firm, introduces UK and other European accounts to TradeStation Securities. Contact — David H. Fleischman                                                     Chief Financial Officer TradeStation Group, Inc. 954-652-7000