Tradestation 9.1 -

: Introduced in Update 22, it supports trading AAPL, GOOG, and SPY mini options at 1/10th the size of standard contracts. Update Manager

Most current users are encouraged to use TradeStation 10, but understanding the technical shift is vital for those managing legacy code. Cyclical Trading Trends and Strategies | PDF - Scribd tradestation 9.1

: For the first time, users could evaluate risk and optimization scenarios for a combination of multiple symbols and strategies simultaneously. : Introduced in Update 22, it supports trading