// Downloaded From https://www.WiseStockTrader.com
// AFL code by Edward Pottasch, Jan 2013
// HL-LH (Bear) and LH-HL (Bull) patterns
xx=BarIndex();x=xx;Lx=LastValue(x);
nbar=Param("N Pivot Bars",5,2,50,1); 
tf=Param("Time Frame (min)",5,1,1440,1);tfrm=in1Minute*tf;
atrper=Param("ATR Period (bars)",20,2,100,1); 
facty=Param("Y Factor",2.5,0,10,0.1); 
CleanPivots=ParamToggle("Use Clean Pivots","Off|On",1);
PivotSymmetry=ParamToggle("Use Symmetric Pivots","Off|On",0);
dispbeHS=ParamToggle("Display bearish HS","Off|On",1);
dispbuHS=ParamToggle("Display bullish HS","Off|On",1);

TimeFrameSet(tfrm); 
atra=ATR(atrper);
if(PivotSymmetry)
{
	fc=1;
	pk=H>Ref(HHV(H,nbar*fc),-1) AND Ref(HHV(H,nbar),nbar)<=H;
	tr=L<Ref(LLV(L,nbar*fc),-1) AND Ref(LLV(L,nbar),nbar)>=L;
}
else
{
	fc=2;
	pk=H>Ref(HHV(H,nbar*fc),-1) AND Ref(HHV(H,nbar),nbar)<=H;
	tr=L<Ref(LLV(L,nbar*fc),-1) AND Ref(LLV(L,nbar),nbar)>=L;
}

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);
px3=ValueWhen(pk,x,3); tx3=ValueWhen(tr,x,3);
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);
ph3=ValueWhen(pk,H,3); tl3=ValueWhen(tr,L,3);

if(CleanPivots)
{
	tr=IIf((tr==1 AND pk==1) AND px2<tx2,False,tr);
	pk=IIf((tr==1 AND pk==1) AND px2>tx2,False,pk);

	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);
	px3=ValueWhen(pk,x,3); tx3=ValueWhen(tr,x,3);	
	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);
	ph3=ValueWhen(pk,H,3); tl3=ValueWhen(tr,L,3);	
	
	tr=IIf(tr AND ((tx0<px0 AND tl1>tl0) OR (tx2>px1 AND tl1>=tl2) OR (px0==px1 AND tl1>tl0)),False,tr);
	pk=IIf(pk AND ((px0<tx0 AND ph1<ph0) OR (px2>tx1 AND ph1<=ph2) OR (tx0==tx1 AND ph1<ph0)),False,pk);

	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);
	px3=ValueWhen(pk,x,3); tx3=ValueWhen(tr,x,3);
	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);
	ph3=ValueWhen(pk,H,3); tl3=ValueWhen(tr,L,3);	

	tr=IIf(tr AND ((tx0<px0 AND tl1>tl0) OR (tx2>px1 AND tl1>=tl2) OR (px0==px1 AND tl1>tl0)),False,tr);
	pk=IIf(pk AND ((px0<tx0 AND ph1<ph0) OR (px2>tx1 AND ph1<=ph2) OR (tx0==tx1 AND ph1<ph0)),False,pk);

	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);
	px3=ValueWhen(pk,x,3); tx3=ValueWhen(tr,x,3);
	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);
	ph3=ValueWhen(pk,H,3); tl3=ValueWhen(tr,L,3);	
}
pkh=IIf(pk,H,Null);
trl=IIf(tr,L,Null);
TimeFrameRestore();
fact=Nz(Max(tfrm/60,Interval()/60)/(Interval()/60));
if(fact==0)fact=1;
Lkbk=Nz(tfrm/Interval());
if(Lkbk>1)
{
	pk=TimeFrameExpand(pk,tfrm,expandFirst);
	pkh=TimeFrameExpand(pkh,tfrm,expandFirst);
	pkhs=IIf(!IsEmpty(pkh),1,0);pkhs=pkhs-Ref(pkhs,-1);
	pk=pk AND H==pkh;
	cond1=Sum(pk,BarsSince(pkhs==1)+1)==1 AND pk;
	pk=pk AND cond1;
	
	tr=TimeFrameExpand(tr,tfrm,expandFirst);	
	trl=TimeFrameExpand(trl,tfrm,expandFirst);
	trls=IIf(!IsEmpty(trl),1,0);trls=trls-Ref(trls,-1);
	tr=tr AND L==trl;
	cond1=Sum(tr,BarsSince(trls==1)+1)==1 AND tr;
	tr=tr AND cond1;
	
	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);
	px3=ValueWhen(pk,x,3); tx3=ValueWhen(tr,x,3);
	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);
	ph3=ValueWhen(pk,H,3); tl3=ValueWhen(tr,L,3);
	
	atra=TimeFrameExpand(atra,tfrm,expandFirst);
}
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;

ll_h=IIf(ll,1,0);
hl_h=IIf(hl,2,0);
hh_h=IIf(hh,3,0);
lh_h=IIf(lh,4,0);
dt_h=IIf(dt,5,0);
db_h=IIf(db,6,0);

combi=ll_h+hl_h+lh_h+hh_h+dt_h+db_h;

t0=ValueWhen(combi,combi,0);
t1=ValueWhen(combi,combi,1);
t2=ValueWhen(combi,combi,2);
t3=ValueWhen(combi,combi,3);
t4=ValueWhen(combi,combi,4);
t5=ValueWhen(combi,combi,5);

// bearisch pattern
beHH=pk AND t1==4 AND t2==2 AND (t3==3 OR t3==4) AND (t4==1 OR t4==2);
beAx=ValueWhen(beHH,tx2);beAy=ValueWhen(beHH,tl2);
beBx=ValueWhen(beHH,px2);beBy=ValueWhen(beHH,ph2);
beCx=ValueWhen(beHH,tx1);beCy=ValueWhen(beHH,tl1);
beDx=ValueWhen(beHH,px1);beDy=ValueWhen(beHH,ph1);
beHH= BeHH AND (beAy-beDy)/(beCy-beBy)>facty;

// bullish pattern
buHH=tr AND t1==2 AND t2==4 AND (t3==1 OR t3==2) AND (t4==3 OR t4==4);
buAx=ValueWhen(buHH,px2);buAy=ValueWhen(buHH,ph2);
buBx=ValueWhen(buHH,tx2);buBy=ValueWhen(buHH,tl2);
buCx=ValueWhen(buHH,px1);buCy=ValueWhen(buHH,ph1);
buDx=ValueWhen(buHH,tx1);buDy=ValueWhen(buHH,tl1);
buHH= BuHH AND (buDy-buAy)/(buBy-buCy)>facty;

SetChartBkColor(ColorRGB(0,0,0));SetChartOptions(0,chartShowDates);
SetBarFillColor(IIf(C>O,colorGreen,IIf(C<=O,colorRed,colorLightGrey)));
Plot(C,"Price",IIf(C>O,colorDarkGreen,IIf(C<=O,colorDarkRed,colorLightGrey)),64,0,0,0,0);
Plot(pkh,"",colorRed,styleThick,0,0,0,-1);
Plot(trl,"",colorBrightGreen,styleThick,0,0,0,-1);
PlotShapes(shapeSmallCircle*tr,IIf(Lx-ValueWhen(tr,x)>nbar*fact,ColorRGB(0,100,0),colorWhite),0,L,-10);
PlotShapes(shapeSmallCircle*pk,IIf(Lx-ValueWhen(pk,x)>nbar*fact,ColorRGB(255,0,0),colorWhite),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() + 
"\nNbar: " + nbar + 
"\nChart TF: " + tt + tf + 
"\nTrend TF: " + tta + tfa;

abcdy_up=20;
abcdy_dn=28;
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;
} 
function GfxConvertBarToPixelX(bar) 
{ 
	lvb=Status("lastvisiblebar"); 
	fvb=Status("firstvisiblebar"); 
	pxchartleft=Status("pxchartleft"); 
	pxchartwidth=Status("pxchartwidth"); 
	return pxchartleft+bar*pxchartwidth/(lvb-fvb+1); 
} 
function GfxConvertValueToPixelY(value) 
{
	local Miny,Maxy,pxchartbottom,pxchartheight; 
	Miny=Status("axisminy");
	Maxy=Status("axismaxy");
	pxchartbottom=Status("pxchartbottom");
	pxchartheight=Status("pxchartheight");
	return pxchartbottom-floor(0.5+(Value-Miny)*pxchartheight/(Maxy-Miny)); 
} 
AllVisibleBars=GetVisibleBarCount();
fvb=Status("firstvisiblebar");
abcdy_up=GfxConvertPixelToValueY(abcdy_up);
abcdy_dn=GfxConvertPixelToValueY(abcdy_dn);

for(i=0;i<AllVisibleBars;i++) 
{
	if(beHH[i+fvb] AND dispbeHS)
	{
		GfxSetOverlayMode(1); 
		GfxSelectPen(ColorRGB(100,0,0),2); 
		GfxSelectSolidBrush(ColorRGB(30,0,0)); 	
		lvix=i+fvb;
		GfxPolygon(
		GfxConvertBarToPixelX(i-(beDx[lvix]-beAx[lvix])),GfxConvertValueToPixelY(beAy[lvix]),
		GfxConvertBarToPixelX(i-(beDx[lvix]-beBx[lvix])),GfxConvertValueToPixelY(beBy[lvix]),
		GfxConvertBarToPixelX(i-(beDx[lvix]-beDx[lvix])),GfxConvertValueToPixelY(beDy[lvix]),
		GfxConvertBarToPixelX(i-(beDx[lvix]-beCx[lvix])),GfxConvertValueToPixelY(beCy[lvix]));
	}
	if(buHH[i+fvb] AND dispbuHS)
	{
		GfxSetOverlayMode(1); 
		GfxSelectPen(ColorRGB(0,100,0),2); 
		GfxSelectSolidBrush(ColorRGB(0,30,0)); 	
		lvix=i+fvb;
		GfxPolygon(
		GfxConvertBarToPixelX(i-(buDx[lvix]-buAx[lvix])),GfxConvertValueToPixelY(buAy[lvix]),
		GfxConvertBarToPixelX(i-(buDx[lvix]-buBx[lvix])),GfxConvertValueToPixelY(buBy[lvix]),
		GfxConvertBarToPixelX(i-(buDx[lvix]-buDx[lvix])),GfxConvertValueToPixelY(buDy[lvix]),
		GfxConvertBarToPixelX(i-(buDx[lvix]-buCx[lvix])),GfxConvertValueToPixelY(buCy[lvix]));	
	}
}