[amibroker] Re: Foreign-S&P500 trend-code question

["Mike" <sfclimbers@xxxxxxxxx>]

Your usage of Foreign appears to be incorrect. Refer to 
http://www.amibroker.com/guide/afl/afl_view.php?id=54 where you will 
see that valid values for the second argument are limited 
to "open", "close", "high", "low", "volume", "interest". "Ref(Close,-
20)" is not valid.

Have a look at SetForeign/RestorePriceArrays instead. 
http://www.amibroker.com/guide/afl/afl_view.php?id=247

Mike

--- In amibroker@xxxxxxxxxxxxxxx, "srengret" <lechols@xxx> wrote:
>
> 
> 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
>




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