Composites for seasonals in TradeStation

[Phil <rhodes@xxxxxxxxxxxxxx>]

    I was wondering if there is a way to make a composite of say 5 or 10
years of a commodities close and chart it like a moving average?  What I am
getting at is making some seasonal charts for TradeStation!  Is this
possible?  If it is, please if possible let me know how etc!  I believe in
some trading, seasonals would be good filters?  I would also like to be able
to make different years like only bull years or bear years etc.  Any
information would be helpful!!
Thank You,
                       Phil
                       rhodes@xxxxxxxxxxxxxx