Please help me to change background color from green to red or viceversa as per change in line and also how to plot buy sell signals/arrows, IT WILL BE A GREAT HELP , THANKS IN ADVANCE
p=30;
p = Param("p",30,2,100,1);
Om=DEMA(O,p);
hm=DEMA(H,p);
lm=DEMA(L,p);
Cm=DEMA(C,p);
X=HACLOSE=(Om+Hm+Lm+Cm)/4;
HaOpen = AMA( Ref( HaClose, -1), 1);
HaHigh = Max( Hm, Max( HaClose, HaOpen ) );
HaLow = Min( Lm, Min( HaClose, HaOpen ) );
slope = Param("slope",2,2,100,1);
Color20= IIf(LinRegSlope(MA(HaClose,a),slope)<0,colorRed,colorGreen);
Y=Plot(MA(HaClose,a),"", color20,styleThick);
Color=IIf(Haclose>MA(HaClose,a),colorGreen, colorRed);
_SECTION_END();
p=30;
p = Param("p",30,2,100,1);
Om=DEMA(O,p);
hm=DEMA(H,p);
lm=DEMA(L,p);
Cm=DEMA(C,p);
X=HACLOSE=(Om+Hm+Lm+Cm)/4;
HaOpen = AMA( Ref( HaClose, -1), 1);
HaHigh = Max( Hm, Max( HaClose, HaOpen ) );
HaLow = Min( Lm, Min( HaClose, HaOpen ) );
slope = Param("slope",2,2,100,1);
Color20= IIf(LinRegSlope(MA(HaClose,a),slope)<0,colorRed,colorGreen);
Y=Plot(MA(HaClose,a),"", color20,styleThick);
Color=IIf(Haclose>MA(HaClose,a),colorGreen, colorRed);
_SECTION_END();