[amibroker] Need a little AFL formula help please

["gosub283" <gosub283@xxxxxxxxx>]

Hi All,

I am trying to do the following and don't quite
know haw to pull it off in AFL. For the description below assume 
nPeriod = param("Period",5,20,1);

Here is it...
Sum(absolute value) of  [Close today - Close yesterday]over nPeriod 
days

Can anyone help me put that in AFL ?

Thank to anyone who contributes,
Gosub283





------------------------ Yahoo! Groups Sponsor ---------------------~-->
Rent DVDs Online - Over 14,500 titles.
No Late Fees & Free Shipping.
Try Netflix for FREE!
http://us.click.yahoo.com/vhSowB/XP.FAA/3jkFAA/GHeqlB/TM
---------------------------------------------------------------------~->

Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
-----------------------------------------
Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx 
(Web page: http://groups.yahoo.com/group/amiquote/messages/)
--------------------------------------------
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/