[amibroker] Help with this code please

[Waleed Khalil <waleedkhalil@xxxxxxxxx>]

Dear All
I need to do a simple code for research purpose,which buy when close 
penetrate the previous peak , and sell if close break the previous 
bottom or break the previous peak .
i wrote this code but i don't know what is wrong with it.

z=Zig(C,4);
Plot(C,"C",1,64);
Plot(z,"",colorRed,styleThick);
Condi1=C<Peak(z,1);
Condi2=C<Trough(z,1);
Buy=C>Peak(z,1);
Sell=Condi1 or Condi2 ;
Buy = ExRem( Buy, Sell );
Sell = ExRem( Sell, Buy );
PlotShapes( IIf( Buy , shapeUpArrow , shapeNone ),colorGreen );
PlotShapes( IIf( Sell, shapeUpArrow + shapePositionAbove, shapeNone 
),colorRed );

thanks in advance
Waleed


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