shapeHollowdownTriangle+shapePositionAbove gives square??

["giggollo99" <giggollo@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

PlotShapes( 
iif(sell,shapeHollowdownTriangle+shapePositionAbove ,Shapenone) , 
colorred , 0, graph0,  65); 

Why does this line give me a red square instead of a downtriangle?? 
Can anyone confirm if this happens to them too?