[amibroker] What am I not comprehending here, thought PlotShapes worked within backtest

[Homar Simpson]

 This simple code works fine in a chart, but does nothing in a backtest

PlotShapes(1*shapeUpTriangle,colorRed,0,ShortPrice);


in the backtest, I want this :

PlotShapes(short*shapeUpTriangle,colorRed,0,ShortPrice);


Whats wrong here?




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