[amibroker] chart displayed ahead and prior to today!!!!

["ntk98_2000" <ntk98_2000@xxxxxxxxxxx>]

I am confused by following display expressions 
a) "shifted 25 days prior to today " 
b) "then shifted 25 days ahead of today" 

Secondly I like in to color the area between two chart lines like MA
(C,26) and MA(C,52) how can I do that?

Thanks very much in advance.
  





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