windows xp and vista change their time settings 01/01/08 tradestation release a reg file to suit this change. maybe you need to try this reg file ftp://ftp.tradestation.com/PUB/TSPlatUtils/TradeStationTimeZoneFix-3.reg "As a result of previous changes Microsoft made to its Windows XP and Windows Vista operating systems, the dates & times reflected in TradeStation’s Time & Sales and Market Depth windows, as of 1/1/2008, may be incorrect. If you are experiencing this problem, follow the instructions below. Important Note: Windows will give you a warning message since this fix will edit the registry. "