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alternative ZIG type function some additions for Amibroker (AFL)

Indicator
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// Amibroker AFL code by Edward Pottasch, Oct 2012
// Alternative ZIG type function based on the ATR and VSTOP functions
// Added multiple timeframes. Maximum timeframe set to 1440 minutes 

x=xx=BarIndex();
tc=ParamList("Display Mode","ZIG|VSTOP|ZIG&VSTOP",0);
disp0=ParamToggle("Display labels","Off|On",1);
disp1=ParamToggle("Display value labels","Off|On",1);
tf=Param("Time Frame (min)",60,1,1440,1);tfrm=in1Minute*tf;
perBull=Param("perBull",20,1,150,1);
perBear=Param("perBear",20,1,150,1);
multBull=Param("multBull",2,0.05,4,0.05);
multBear=Param("multBear",2,0.05,4,0.05);
perc=Param("Percentage Range (S/R lines)",20,0.05,100,0.01);
npiv=Param("N Pivots Used (S/R lines)",1,1,250,1);
disp2=ParamToggle("Display S/R levels","Off|On",0);

TimeFrameSet(tfrm);
function vstop_func(trBull,trBear)
{
	trailArray[0]=C[0];
	for(i=1;i<BarCount;i++)
	{
		prev=trailArray[i-1];
 
		if(C[i]>prev AND C[i-1]>prev)
		{
			trailArray[i]=Max(prev,C[i]-trBull[i]);
		}
		else if(C[i]<prev AND C[i-1]< prev)
		{
			trailArray[i]=Min(prev,C[i]+trBear[i]);
		}
		else if (C[i]>prev)
		{
			trailArray[i]=C[i]-trBull[i];
		}
		else
		{
			trailArray[i]=C[i]+trBear[i];	
		}
	}
	return trailArray;
}

trBull=multBull*ATR(perBull);
trBear=multBear*ATR(perBear);
trailArray = vstop_func(trBull,trBear);
ts=IIf(trailArray>C,trailArray,Null);
tl=IIf(trailArray<C,trailArray,Null);
TimeFrameRestore();

ts=TimeFrameExpand(ts,tfrm,expandLast);
tl=TimeFrameExpand(tl,tfrm,expandLast);
 
GraphXSpace = 5;
SetChartOptions(0, chartShowDates);
SetBarFillColor(IIf(C>O,ParamColor("Candle Up Color", colorBrightGreen),IIf(C<=O,ParamColor("Candle Down Color", colorRed),colorLightGrey)));
Plot(C,"Price",IIf(C>O,ParamColor("Shadow Up Color", ColorRGB(0,255,0)),IIf(C<=O,ParamColor("Shadow Color", ColorRGB(255,0,0)),colorLightGrey)),64,0,0,0,0,1);

lll=LLV(L,BarsSince(!IsEmpty(tl)));lll=IIf(ts,lll,Null);llls=lll;
ttt1=IIf((!IsEmpty(ts) AND IsEmpty(Ref(ts,1))) OR BarIndex()==BarCount-1,1,Null);
ttt=ValueWhen(ttt1,lll,0);ttt=IIf(ts,ttt,Null);ttt=IIf(ttt1,Ref(ttt,-1),ttt);
tr=L==ttt;lll=Sum(tr,BarsSince(!IsEmpty(tl)));
qqq=ValueWhen(ttt1,lll,0);qqq=IIf(ts,qqq,Null);qqq=IIf(ttt1,Ref(qqq,-1),qqq);tr=tr AND lll==qqq;
tr=IIf((!IsEmpty(ts) AND IsEmpty(Ref(ts,1)) AND IsEmpty(Ref(ts,-1))),1,tr);//exception
hhh=HHV(H,BarsSince(!IsEmpty(ts)));hhh=IIf(tl,hhh,Null);hhhs=hhh;
ttt1=IIf((!IsEmpty(tl) AND IsEmpty(Ref(tl,1))) OR BarIndex()==BarCount-1,1,Null);
ttt=ValueWhen(ttt1,hhh,0);ttt=IIf(tl,ttt,Null);ttt=IIf(ttt1,Ref(ttt,-1),ttt);
pk=H==ttt;hhh=Sum(pk,BarsSince(!IsEmpty(ts)));
sss=ValueWhen(ttt1,hhh,0);sss=IIf(tl,sss,Null);sss=IIf(ttt1,Ref(sss,-1),sss);pk=pk AND hhh==sss;
pk=IIf((!IsEmpty(tl) AND IsEmpty(Ref(tl,1)) AND IsEmpty(Ref(tl,-1))),1,pk);//exception

px0=ValueWhen(pk,x,0); tx0=ValueWhen(tr,x,0);
px1=ValueWhen(pk,x,1); tx1=ValueWhen(tr,x,1);
px2=ValueWhen(pk,x,2); tx2=ValueWhen(tr,x,2);
ph0=ValueWhen(pk,H,0); tl0=ValueWhen(tr,L,0);
ph1=ValueWhen(pk,H,1); tl1=ValueWhen(tr,L,1);
ph2=ValueWhen(pk,H,2); tl2=ValueWhen(tr,L,2);

minipk=H>=Ref(HHV(H,1),-1) AND Ref(HHV(H,1),1)<H;
minitr=L<=Ref(LLV(L,1),-1) AND Ref(LLV(L,1),1)>L;

switch(tc)
{
case("ZIG"):
aa1=IIf(px0>tx1,(ph0-tl1)/(px0-tx1),0);aa1=IIf(pk,Ref(aa1,-1),aa1);ls1=aa1*(xx-tx1)+tl1;
bb1=IIf(px0>tx1 AND px1<tx1,1,0);bb1=bb1+Ref(bb1,-1);bb1=IIf(bb1,1,0);ls1=IIf(bb1,ls1,Null);
Plot(ls1,"",colorBlue,styleLine,0,0,0,2,3);
aa1=IIf(tx0>px1,(tl0-ph1)/(tx0-px1),0);aa1=IIf(tr,Ref(aa1,-1),aa1);ls1=aa1*(xx-px1)+ph1;
bb1=IIf(tx0>px1 AND tx1<px1,1,0);bb1=bb1+Ref(bb1,-1);bb1=IIf(bb1,1,0);ls1=IIf(bb1,ls1,Null);
Plot(ls1,"",colorOrange,styleLine,0,0,0,2,3);
break;
case("VSTOP"):
Plot(ts,"\ntrailShort",colorRed,styleLine,0,0,0,1,1);
Plot(llls,"",colorRed,styleDashed,0,0,0,1,1);
Plot(tl,"\ntrailLong",colorGreen,styleLine,0,0,0,1,1);
Plot(hhhs,"",colorGreen,styleDashed,0,0,0,1,1);
break;
case("ZIG&VSTOP"):
aa1=IIf(px0>tx1,(ph0-tl1)/(px0-tx1),0);aa1=IIf(pk,Ref(aa1,-1),aa1);ls1=aa1*(xx-tx1)+tl1;
bb1=IIf(px0>tx1 AND px1<tx1,1,0);bb1=bb1+Ref(bb1,-1);bb1=IIf(bb1,1,0);ls1=IIf(bb1,ls1,Null);
Plot(ls1,"",colorBlue,styleLine,0,0,0,2,3);
aa1=IIf(tx0>px1,(tl0-ph1)/(tx0-px1),0);aa1=IIf(tr,Ref(aa1,-1),aa1);ls1=aa1*(xx-px1)+ph1;
bb1=IIf(tx0>px1 AND tx1<px1,1,0);bb1=bb1+Ref(bb1,-1);bb1=IIf(bb1,1,0);ls1=IIf(bb1,ls1,Null);
Plot(ls1,"",colorOrange,styleLine,0,0,0,2,3);
Plot(ts,"\ntrailShort",colorRed,styleLine,0,0,0,1,1);
Plot(llls,"",colorRed,styleDashed,0,0,0,1,1);
Plot(tl,"\ntrailLong",colorGreen,styleLine,0,0,0,1,1);
Plot(hhhs,"",colorGreen,styleDashed,0,0,0,1,1);
break;
}

PlotShapes(shapeSmallCircle*tr,colorGreen,0,L,-10);
PlotShapes(shapeSmallCircle*pk,colorRed,0,H,10);

qq=Interval()/60;
if(qq < 60){tf=" min";tt=qq;}
else if(qq >= 60 AND qq < 1440){tf=" hrs";tt=qq/60;}
else if(qq >= 1440){tf=" days";tt=(qq/60)/24;}
qq=Max(tfrm/60,Interval()/60);
if(qq < 60){tfa=" min";tta=qq;}
else if(qq >= 60 AND qq < 1440){tfa=" hrs";tta=qq/60;}
else if(qq >= 1440){tfa=" days";tta=(qq/60)/24;}

Title = Name() + 
"\nChart TF: " + tt + tf + 
"\nZig TF: " + tta + tfa;

dxhm=14;dxlm=10;dxh=0;dxl=0;dyhm=5;dylm=3;dyh=18;dyl=29;hm=30;lm=30;
dyl2=42;dylm2=16;dyhm2=18;dyh2=31;
function GetVisibleBarCount() 
{
	lvb=Status("lastvisiblebar");
	fvb=Status("firstvisiblebar");
	return Min(lvb-fvb,BarCount-fvb);
} 
function GfxConvertPixelsToBarX(Pixels)
{
	lvb=Status("lastvisiblebar");
	fvb=Status("firstvisiblebar");
	pxchartleft=Status("pxchartleft");
	pxchartwidth=Status("pxchartwidth");
	fac=pxchartwidth/Pixels;
	bar=(lvb-fvb)/fac;
	return bar;
} 
function GfxConvertPixelToValueY(Pixels) 
{
	local Miny,Maxy,pxchartbottom,pxchartheight;
	Miny=Status("axisminy");
	Maxy=Status("axismaxy");
	pxchartbottom=Status("pxchartbottom");
	pxchartheight=Status("pxchartheight");
	fac=pxchartheight/Pixels;
	Value=(Maxy-Miny)/fac;
	return Value;
} 

ll=tr AND tl1<tl2;
hl=tr AND tl1>tl2;
hh=pk AND ph1>ph2;
lh=pk AND ph1<ph2;
dt=pk AND ph1==ph2;
db=tr AND tl1==tl2;

miny=Status("axisminy");
maxy=Status("axismaxy");
AllVisibleBars=GetVisibleBarCount();
fvb=Status("firstvisiblebar");
LowMargin=Miny+GfxConvertPixelToValueY(lm);
HighMargin=Maxy-GfxConvertPixelToValueY(hm);
dyllm=GfxConvertPixelToValueY(dylm);
dyhhm=GfxConvertPixelToValueY(dyhm);
dyll=GfxConvertPixelToValueY(dyl);
dyhh=GfxConvertPixelToValueY(dyh);
dxllm=GfxConvertPixelsToBarX(dxlm);
dxhhm=GfxConvertPixelsToBarX(dxhm);
dxll=GfxConvertPixelsToBarX(dxl);
dxhh=GfxConvertPixelsToBarX(dxh);

dyllm2=GfxConvertPixelToValueY(dylm2);
dyll2=GfxConvertPixelToValueY(dyl2);
dyhhm2=GfxConvertPixelToValueY(dyhm2);
dyhh2=GfxConvertPixelToValueY(dyh2);

if(disp0)
{
for(i=0;i<AllVisibleBars;i++) 
{
	// HH,HL etc. labels
	if(ll[i+fvb] AND L[i+fvb]>LowMargin) PlotText("LL",i+fvb+dxll,L[i+fvb]-dyll,colorWhite,colorDefault);
	if(ll[i+fvb] AND L[i+fvb]<=LowMargin) PlotText("LL",i+fvb+dxll+dxllm,L[i+fvb]-dyllm,colorWhite,colorDefault);
	if(hl[i+fvb] AND L[i+fvb]>LowMargin) PlotText("HL",i+fvb+dxll,L[i+fvb]-dyll,colorWhite,colorDefault);
	if(hl[i+fvb] AND L[i+fvb]<=LowMargin) PlotText("HL",i+fvb+dxll+dxllm,L[i+fvb]-dyllm,colorWhite,colorDefault);
	if(db[i+fvb] AND L[i+fvb]>LowMargin) PlotText("DB",i+fvb+dxll,L[i+fvb]-dyll,colorWhite,colorDefault);
	if(db[i+fvb] AND L[i+fvb]<=LowMargin) PlotText("DB",i+fvb+dxll+dxllm,L[i+fvb]-dyllm,colorWhite,colorDefault);	
	if(hh[i+fvb] AND H[i+fvb]<HighMargin) PlotText("HH",i+fvb+dxhh,H[i+fvb]+dyhh,colorWhite,colorDefault);
	if(hh[i+fvb] AND H[i+fvb]>=HighMargin) PlotText("HH",i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm,colorWhite,colorDefault);	
	if(lh[i+fvb] AND H[i+fvb]<HighMargin) PlotText("LH",i+fvb+dxhh,H[i+fvb]+dyhh,colorWhite,colorDefault);
	if(lh[i+fvb] AND H[i+fvb]>=HighMargin) PlotText("LH",i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm,colorWhite,colorDefault);		
	if(dt[i+fvb] AND H[i+fvb]<HighMargin) PlotText("DT",i+fvb+dxhh,H[i+fvb]+dyhh,colorWhite,colorDefault);
	if(dt[i+fvb] AND H[i+fvb]>=HighMargin) PlotText("DT",i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm,colorWhite,colorDefault);
}
}
if(disp1)
{
for(i=0;i<AllVisibleBars;i++) 	
{
	// value labels at HH,HL etc.
	if(ll[i+fvb] AND L[i+fvb]>LowMargin) PlotText(""+L[i+fvb],i+fvb+dxll,L[i+fvb]-dyll2,colorWhite,colorDefault);
	if(ll[i+fvb] AND L[i+fvb]<=LowMargin) PlotText(""+L[i+fvb],i+fvb+dxll+dxllm,L[i+fvb]-dyllm2,colorWhite,colorDefault);
	if(hl[i+fvb] AND L[i+fvb]>LowMargin) PlotText(""+L[i+fvb],i+fvb+dxll,L[i+fvb]-dyll2,colorWhite,colorDefault);
	if(hl[i+fvb] AND L[i+fvb]<=LowMargin) PlotText(""+L[i+fvb],i+fvb+dxll+dxllm,L[i+fvb]-dyllm2,colorWhite,colorDefault);
	if(db[i+fvb] AND L[i+fvb]>LowMargin) PlotText(""+L[i+fvb],i+fvb+dxll,L[i+fvb]-dyll2,colorWhite,colorDefault);
	if(db[i+fvb] AND L[i+fvb]<=LowMargin) PlotText(""+L[i+fvb],i+fvb+dxll+dxllm,L[i+fvb]-dyllm2,colorWhite,colorDefault);	
	if(hh[i+fvb] AND H[i+fvb]<HighMargin) PlotText(""+H[i+fvb],i+fvb+dxhh,H[i+fvb]+dyhh2,colorWhite,colorDefault);
	if(hh[i+fvb] AND H[i+fvb]>=HighMargin) PlotText(""+H[i+fvb],i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm2,colorWhite,colorDefault);	
	if(lh[i+fvb] AND H[i+fvb]<HighMargin) PlotText(""+H[i+fvb],i+fvb+dxhh,H[i+fvb]+dyhh2,colorWhite,colorDefault);
	if(lh[i+fvb] AND H[i+fvb]>=HighMargin) PlotText(""+H[i+fvb],i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm2,colorWhite,colorDefault);		
	if(dt[i+fvb] AND H[i+fvb]<HighMargin) PlotText(""+H[i+fvb],i+fvb+dxhh,H[i+fvb]+dyhh2,colorWhite,colorDefault);
	if(dt[i+fvb] AND H[i+fvb]>=HighMargin) PlotText(""+H[i+fvb],i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm2,colorWhite,colorDefault);
}
}
if(disp2)
{
miny=LastVisibleValue(C)-LastVisibleValue(C)/100*perc;
maxy=LastVisibleValue(C)+LastVisibleValue(C)/100*perc;
for (i=1;i<=npiv;i++)
{
    rr=ValueWhen(pk,H,i);
    rr=IIf(rr>maxy OR rr<miny,Null,rr);
    ss=ValueWhen(tr,L,i);
    ss=IIf(ss>maxy OR ss<miny,Null,ss);
    Plot(rr,"",colorBlue,styleNoLine|styleDots,0,0,0,-1);    
    Plot(ss,"",colorRed,styleNoLine|styleDots,0,0,0,-1);
}
}
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