[amibroker] How to RSI a Foreign

["ckinsey2003" <ckinsey2003@xxxxxxxxx>]

Hope someone can show me how to get the RSI of a 
"Foreign" securitys data.

The following does not work. <G>
SP_RSI = RSI(Foreign("^SPX","Close"), 8);

I would like the RSI of the S&P, so I can overlay it on current stock. 

I have looked around for hours but can not find an example.

Thanks,   Jack





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