[amibroker] TimeFrameset question

["Steve" <avalon-ardy@xxxxxxxxxxxxxxx>]

On a 15 minute chart I want to use plotshapes to indicate if a 4hr bar's close was up or 
down relative to prev a 4hr bar. I've tried the following, but it doesn't work. Obviously 
I'm doing something wrong, but I can't quite work it out. Anyone? Thanks!


TimeFrameSet( 4*inHourly );
CLU4 = C > Ref( C,-1) AND Ref(C,-1) > Ref(O,-1);
CLD4 = C < Ref( C,-1) AND Ref(0,-1) <  Ref(C,-1);
TimeFrameRestore();

CLU44 = TimeFrameExpand(CLU4,4*inHourly);
CLD44 = TimeFrameExpand(CLD4,4*inHourly);

PlotShapes(CLU44*shapeUpArrow,colorAqua,0,High,-15);
PlotShapes(CLD44*shapeDownArrow,colorDarkYellow,0,Low,-15); 




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