Auto Support Resistance advance trend lines for Amibroker (AFL)

Auto Support Resistance advance trend lines for Amibroker (AFL)

_SECTION_BEGIN("Advanced Trend Lines");
function GetXSupport(Lo, Percentage, Back)
{
return ((BarCount - 1) - LastValue(TroughBars(Lo, Percentage,Back)));
}
function GetYSupport(Lo, Percentage, Back)
{
return (LastValue(Trough(Lo, Percentage, back)));
}

function GetXResistance(Hi, Percentage, Back)
{
return ((BarCount - 1) -LastValue(PeakBars(Hi, Percentage, Back)));
}
function GetYResistance(Hi, Percentage, Back)
{
return (LastValue(Peak(Hi, Percentage, Back)));
}
function TD_Supply(P)
{
return ( P > Ref(P, 1) AND P > Ref(P, -1) AND P > Ref(C, -2));
}
function TD_Demand(P)
{
return ( P < Ref(P, 1) AND P < Ref(P, -1) AND P < Ref(C, -2));
}
////////////////////////////////////////////////////////////////////////
//Parameters
Percentage = Param("Percentage", 1.5, 0.01, 100. ,0.01);
DrawAllLines = ParamToggle("Draw All Lines?", "No|Yes");
Lines = Param("Lines?", 1, 1, BarCount-2);
DrawR = ParamList("Resistance Points", "Off|High to High|High to Low", 1);
DrawS = ParamList("Support Points", "Off|Low to Low|Low to High", 1);
ShowTDP = ParamToggle("Show TD Pionts", "No|Yes", 1);
AllOrDownR = ParamToggle("Resistance Direction", "All|Down");
AllOrUpS = ParamToggle("Support Direction", "All|Up");
ShowSR = ParamToggle("Show Vert S/R","No|Yes", 1);
SRPer = Param("S/R Percentage", 3, 1);
SRBack = Param("S/R Back", 5, 1);
str = "";
Res = Sup = 0;
Con = 1;
////////////////////////////////////////////////////////////////////////
Main = C;
Con = ConS = ConR = 1;
if(DrawS=="Low to Low")
{
Support1 = L;
Support2 = L;
}
else
{
Support1 = L;
Support2 = H;
}
if(DrawR=="High to High")
{
Resistance1 = H;
Resistance2 = H;
}
else
{
Resistance1 = H;
Resistance2 = L;
}
////////////////////////////////////////////////////////////////////////
//Plotting Area
Plot(Main, "", IIf(C>O,colorGreen, colorRed), styleCandle);
if(DrawAllLines)
for(i = 2; i<=Lines+1; i++)
{
if(DrawS!="Off")
{
x0 = GetXSupport(Support1, Percentage, i);
x1 = GetXSupport(Support2, Percentage, i-1);
y0 = GetYSupport(Support1, Percentage, i);
y1 = GetYSupport(Support2, Percentage, i-1);
x = LineArray(x0, y0, x1, y1, 1);
if(AllOrUpS) ConS = StrToNum(NumToStr(y0 < y1));
if(Con AND ConS)
Plot(x, "", IIf(LastValue(C) < LastValue(x), colorBlue,colorBlue),
styleLine|styleThick);
}
if(DrawR!="Off")
{
x0 = GetXResistance(Resistance1, Percentage, i);
x1 = GetXResistance(Resistance2, Percentage, i-1);
y0 = GetYResistance(Resistance1, Percentage, i);
y1 = GetYResistance(Resistance2, Percentage, i-1);
x = LineArray(x0, y0, x1, y1, 1);
if(AllOrDownR) ConR = y0 > y1;
if(Con AND ConR)
Plot(x, "", IIf(LastValue(C) < LastValue(x), colorRed,colorRed),
styleLine|styleThick);
}
}
else
{
if(DrawS!="Off")
{
x0 = GetXSupport(Support1, Percentage, Lines+1);
x1 = GetXSupport(Support2, Percentage, Lines);
y0 = GetYSupport(Support1, Percentage, Lines+1);
y1 = GetYSupport(Support2, Percentage, Lines);
x = LineArray(x0, y0, x1, y1, 1 );
Sup = LastValue(LinRegSlope(x, Lines+1));
if(AllOrUpS) ConS = y0 < y1;
if(Con AND ConS)
Plot(x, "", IIf(LastValue(C) < LastValue(x), colorBlue,colorBlue),
styleLine|styleThick);
}
if(DrawR!="Off")
{
x0 = GetXResistance(Resistance1, Percentage, Lines+1);
x1 = GetXResistance(Resistance2, Percentage, Lines);
y0 = GetYResistance(Resistance1, Percentage, Lines+1);
y1 = GetYResistance(Resistance2, Percentage, Lines);
x = LineArray(x0, y0, x1, y1, 1 );
Res = LastValue(LinRegSlope(x, Lines+1));
if(AllOrDownR) ConR = y0 > y1;
if(Con AND ConR)
Plot(x, "", IIf(LastValue(C) < LastValue(x), colorRed,colorRed),
styleLine|styleThick);
}
str = "\nR Slope=("+Res+"), S Slope=("+Sup+")";
}

if(ShowTDP)
{
PlotShapes(TD_Supply(H)*shapeSmallCircle, colorRed, 0, H, H*.001);
PlotShapes(TD_Demand(L)*shapeSmallCircle, colorGreen, 0, L, -L*.001);
}
if(ShowSR)
{
for(i=1; i<=SRBack; i++)
{
x0 = GetXSupport(L, SRPer, i);
x1 = BarCount-1;
y0 = GetYSupport(L, SRPer, i);
x = LineArray(x0, y0, x1, y0, 0);
Plot(x, "", IIf(LastValue(C) > x, colorDarkGreen, colorDarkRed),
styleLine|styleDashed|styleThick);
x0 = GetXResistance(H, SRPer, i);
y0 = GetYResistance(H, SRPer, i);
x = LineArray(x0, y0, x1, y0, 0);
Plot(x, "", IIf(LastValue(C) > x, colorDarkGreen, colorDarkRed),
styleLine|styleDashed|styleThick);

}
}
Title =FullName()+" ({{NAME}})\n{{DATE}}\n"+"Open: "+O+", Hi: "+H+", Lo: "+L+",Close: "+C+StrFormat(" (%.2f %.2f\%)", C-Ref(C, -1), SelectedValue(ROC(C,
1)))+str;

_SECTION_END();