Eli,

The examples here might help as well:

http://pubs.logicalexpressions.com/P...cle.asp?ID=518

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Regards,
John Mansfield
http://www.pdbook.com


"Eli Kedar" wrote:

I am working with data updated weekly, and making forecast by trend line of
last 12 weeks, if there is a way for dynamic trend line, so I dond have to
change the range every week.

Thank you
--
Eli Kedar
Israel