global variable

[eluser]Hamed[/eluser]
I have one query which I use it in lots of view files and I can not cache this query because it should be change on each request:
Now I decide to call it one time in header and use this query in other views files ut I can not and I get "Undefined variable: ratesGobal"

Is there anyway to do this job?
Now I have more than 37 query in one page.