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 PureBytes Links 
Trading Reference Links 
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There are many other packages that can do what you want.
Technifilter plus    www.rtrsoftware.com
behold                www.bhld.com
excaliber        from futures truth
Technifilter uses their own scripting language, while behold is
basically a mac version of tradestation which a spreadsheet interface
and excaliber is a windows based fortran program.  The first two are
probably the easiest to start with and can accomplish most any type of
portfolio/system testing you would want.
Brian
 
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