[amibroker] help with ref()

[Waleed Khalil <waleedkhalil@xxxxxxxxx>]

Hi all
Please tell me why the Ref function does not get data more that 260 days 
ago,
it returns zero for any period more than 260 days ago

_SECTION_BEGIN("stockovercase");
case30=Foreign ("case30","close ");
Case30basevalue= Ref (Foreign ("case30","close "), -BarCount);
Title = "  BarCount = " + BarCount + "Case30basevalue =" +Case30basevalue  ;
_SECTION_END();



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