Filtering Trades

["Larry M. Powell" <larypowell@xxxx>]

I would like to filter my daily trades with a 
weekly system.  
 
For example:  If the 6 week MA is rising, only 
take long trades and the reverse for short trades.  
 
I believe I could use a 30 day MA but thenI would 
need to use the crossing of a 30 day MA with a 6 day MA.
 
Can either of these "filters" be added to an AFL 
formula?
 
Thanks, again.
 
Larry M. Powell