You could try this for the last part:
Change last part to:
X = Foreign ("^GSPC","Close");
AND X > Ref(x,-20);
----- Original Message -----
From: "srengret" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, January 04, 2008 5:43 AM
Subject: [amibroker] Foreign-S&P500 trend-code question
>
> I'm trying to code buy selection criteria that requires the S&P500
> index ("^GSPC") to be higher now than 20 days ago along with a
> RelStrength measure.
> Here's the section of code of interest:
>
> Buy = RelStrength("^GSPC") > 20.0
> AND Foreign("^GSPC", "Close") > Foreign ("^GSPC", "Ref(Close,-20)");
>
> When I place this in previously working code with other criteria, it
> doesn't seem to have an effect.
>
> Does anyone see what is wrong with the last line and/or is there a
> better way to do this?
>
> Regards,
> SrEngRet
>
>
>
> Please note that this group is for discussion between users only.
>
> To get support from AmiBroker please send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
>
> For other support material please check also:
> http://www.amibroker.com/support.html
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
