help with Pitchfork Level ( OBJPROP_LEVELS )

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hello, i'm trying to add custom levels to a Pitchfork as described here: https://docs.mql4.com/constants/objectconstants/enum_object/obj_pitchfork

 

ObjectCreate(0,"Pitch0",OBJ_PITCHFORK,0,ZZTime[3],ZZPrice[3],ZZTime[2],ZZPrice[2],ZZTime[1],ZZPrice[1]);
ObjectSetInteger(0,"Pitch0",OBJPROP_COLOR,clrRed);
ObjectSetInteger(0,"Pitch0",OBJPROP_STYLE,2);

ObjectSetInteger(0,"Pitch0",OBJPROP_LEVELS,4);

ObjectSetDouble(0,"Pitch0",OBJPROP_LEVELVALUE,0,0.5);
ObjectSetDouble(0,"Pitch0",OBJPROP_LEVELVALUE,0,-0.5);

ObjectSetDouble(0,"Pitch0",OBJPROP_LEVELVALUE,0,1);
ObjectSetDouble(0,"Pitch0",OBJPROP_LEVELVALUE,0,-1);

 

I can see the pitchfork but i can't see any level. what's wrong?

thanks in advance