[amibroker] Where are the arrows controlled from when double clicking an explore ?

[gmorlosky]

I get the standard red and green arrows when double clicking an Explore 
row, but can't seem to control them like I do in other plots with:

PlotShapes(Buy*shapeHollowUpArrow,colorGreen,0,Low,-50);
PlotShapes(Sell*shapeHollowDownArrow,colorRed,0,High,-30);