[amibroker] Why does Maxgraph shift my arrows?

["quexos0" <quexos0@xxxxxxxxxxxx>]

First I have this:

Ding = xxx;
PlotShapes( IIf( Ding, shapeUpArrow, shapeNone ), colorGreen );

This plots a green arrow near the line of the graph.

But when its modified to:

Maxgraph=9999;
Ding = xxx;
PlotShapes( IIf( Ding, shapeUpArrow, shapeNone ), colorGreen );

All the green arrows are shifted to the bottom of the indicator 
screen.
Why??





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