[amibroker] what's wrong in this code

[Pit]

Hi

Id like to plot hourly canal on 5 minutes chart like this
and difference is only in first minutes every hour .


ck=TimeFrameGetPrice( "c", inHourly, -1 );
zak=(HHV(ck,2) -LLV(ck,2))/2;

Plot(ck+zak,"",colorBlack,styleLine);
Plot(Ck-zak,"",colorBlue,styleLine);