ATR Trading Buy Sell System - Amibroker AFL Code

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_SECTION_BEGIN("ATRtrading");
SetChartBkColor( colorBlack ) ;
period = Param("Period", 13, 1, 240, 1);
mult = Param("Multiplier", 1.7, 1, 240, 0.1);
 
f=ATR(period);

VS[0] = Close[0];
trend[0] = 0;
HighC[0]=0;
Lowc[0]=0;
 
for( i = period+1; i < BarCount; i++ )
{

vs[i] = vs[i-1];
trend[i] = trend[i-1];
highC[i] = HighC[i-1];
lowc[i] = lowc[i-1];

if ((trend[i]>=0) && ( C[i] <VS[i] ))
{
trend[i] =-1;
HighC[i] = C[i];
lowc[i] = C[i];
}

if ((trend[i]<=0) && (C[i] >VS[i]))
{
trend[i]=1;
HighC[i] = C[i];
lowc[i] = C[i];
}

if (trend[i]==-1)
{
if (C[i]<lowc[i]) lowc[i] = C[i];
VS[i]= lowc[i]+ (mult*f[i]);
}


if (trend[i]==1)
{
if (C[i]>HighC[i]) HighC[i] = C[i];
VS[i]= HighC[i]-(mult*f[i]);
}

}


Buy=Cross(Trend,0);
Sell=Cross(0, Trend);

Plot(Close,"Close",colorBlue,styleCandle);
Plot(VS, "Vol Stop",IIf(trend==1,10,11 ),styleThick);

mkol = IIf( Trend==1, 10, 11);
Plot(5, "ribbon", mkol, styleOwnScale|styleArea|styleNoLabel, 0, -5); // Weekly trend

shape = Buy * shapeUpArrow + Sell * shapeDownArrow;
PlotShapes( shape, IIf( Buy, colorGreen, colorRed ), 0, IIf( Buy, Low-f, High+f));
_SECTION_END();

//========================fib levels=========================


StartBar=SelectedValue(BarIndex());
FinishBar = EndValue( BarIndex() );
i = startbar;
period = FinishBar - StartBar;

Lo =LLV(L,period);
Hi = HHV(H,period);
Line0 = 0;
Line1 = 0;
Line2 = 0;
Line3 = 0;
Line4= 0;
Line100 = 0;

for( i = startbar; i < finishbar; i++ )
{
if(EndValue(C)<SelectedValue(C))
{
Line0  = EndValue(Lo);
Line100 = EndValue(Hi);
Line1 = Line0 + abs(Line100-Line0)*0.236;
Line2 = Line0 + abs(Line100-Line0)*0.382;
Line3 = Line0 + abs(Line100-Line0)*0.5;
Line4 = Line0 + abs(Line100-Line0)*0.618;
}
else
{
Line100  = EndValue(Lo);
Line0 = EndValue(Hi);
Line1 =Line0 - abs(Line100-Line0)*0.236;
Line2 = Line0 - abs(Line100-Line0)*0.382;
Line3 = Line0 - abs(Line100-Line0)*0.5;
Line4 = Line0 - abs(Line100-Line0)*0.618;
}
}

//external fib lines begining fom selecetdbarindex()
fib0= LineArray(startbar, Line0, finishbar, Line0, 0, 1);
fib100 = LineArray(startbar, Line100, finishbar, Line100, 0, 1);
// depth of middle lines
n= round((finishbar-startbar)/2);

// middle lines
fib1= LineArray((finishbar-n), Line1, finishbar, Line1, 0, 1);
fib2= LineArray((finishbar-n), Line2, finishbar, Line2, 0, 1);
fib3= LineArray((finishbar-n), Line3, finishbar, Line3, 0, 1);
fib4= LineArray((finishbar-n), Line4, finishbar, Line4, 0, 1);
Plot(fib0,"", colorGreen);
Plot(fib100,"", colorRed);
//Plot(fib1,"", colorYellow);
Plot(fib2,"", colorPink);
//Plot(fib3,"", colorOrange);
Plot(fib4,"", colorLightBlue);
_SECTION_END();