[amibroker] plotting Vertical Line?

["mmqp" <mmqp@xxxxxxxxx>]

This might have been asked before. How can I plot vertical line in 
Indicator builder that extends the entire vertical scale.

following statement only plot partial of vertival scale.

Plot( IIf ( BeginValue (barindex()) == barindex(), BeginValue
(xAxis),0 ),"", colorRed, styleNoLine | styleHistogram | 
styleOwnScale );


Thanks





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