Auto trendlines

_SECTION_BEGIN("Trendlines Multitimeframe");
// Amibroker AFL code by Edward Pottasch, 6/8/2011
// Using fractals to create automatic trendlines
// Using option to show multiple timeframes Version(5.21);
xx=BarIndex();x=xx;Lx=LastValue(x);
nbar=Param("N Pivot Bars",3,2,50,1);
tf=Param("Time Frame (min)",5,1,100000,1);tfrm=in1Minute*tf;
CleanPivots=ParamToggle("Use Clean Pivots","Off|On",0);
PivotSymmetry=ParamToggle("Use Symmetric Pivots","Off|On",0);
tld=ParamToggle("All trendlines","Show|Hide",1);
showSignals=ParamToggle("Display signals","Off|On",0);

TimeFrameSet(tfrm);
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);
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);
if (CleanPivots)
{
tr=IIf(pk AND tr AND ph1>ph2 AND tl1>tl2,False,tr);
pk=IIf(pk AND tr AND ph1<ph2 AND tl1<tl2,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);
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);

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

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);

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

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);

pk=IIf(pk AND px1>tx1 AND px2>tx1 AND ph1<ph2,False,pk);
tr=IIf(tr AND tx1>px1 AND tx2>px1 AND tl1>tl2,False,tr);
}
pkh=IIf(pk,H,Null);
trl=IIf(tr,L,Null);
TimeFrameRestore();
fact=Max(tfrm/60,Interval()/60)/(Interval()/60);
Lkbk=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);
    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);
}
y0=ValueWhen(tr,trl,0);
y1=ValueWhen(tr,trl,1);
y2=ValueWhen(tr,trl,2);
y3=ValueWhen(tr,trl,3);
x0=ValueWhen(tr,xx,0);
x1=ValueWhen(tr,xx,1);
x2=ValueWhen(tr,xx,2);
x3=ValueWhen(tr,xx,3);
aa=(Y0-Y1)/(X0-X1);
ls1=aa*(xx-X1)+Y1;
dls1=ls1-Ref(ls1,-1);
aa=(Y1-Y2)/(X1-X2);
ls2=aa*(xx-X1)+Y1;
dls2=ls2-Ref(ls2,-1);
dls2=IIf(tr,Ref(dls1,-1),dls2);
aa=(Y2-Y3)/(X2-X3);
ls3=aa*(xx-X2)+Y2;
dls3=ls3-Ref(ls3,-1);
dls3=IIf(tr,Ref(dls2,-1),dls3);
y0=ValueWhen(pk,pkh,0);
y1=ValueWhen(pk,pkh,1);
y2=ValueWhen(pk,pkh,2);
y3=ValueWhen(pk,pkh,3);
x0=ValueWhen(pk,xx,0);
x1=ValueWhen(pk,xx,1);
x2=ValueWhen(pk,xx,2);
x3=ValueWhen(pk,xx,3);
aa=(Y0-Y1)/(X0-X1);
hs1=aa*(xx-X1)+Y1;
dhs1=hs1-Ref(hs1,-1);
aa=(Y1-Y2)/(X1-X2);
hs2=aa*(xx-X1)+Y1;
dhs2=hs2-Ref(hs2,-1);
dhs2=IIf(pk,Ref(dhs1,-1),dhs2);
aa=(Y2-Y3)/(X2-X3);
hs3=aa*(xx-X2)+Y2;
dhs3=hs3-Ref(hs3,-1);
dhs3=IIf(pk,Ref(dhs2,-1),dhs3);
if (tld)
{
    dd=0.0;
    Vh=dd*(ValueWhen(pk,C)-ValueWhen(pk,Ref(C,-1)))/ValueWhen(pk,C);
    Vl=dd*(ValueWhen(tr,C)-ValueWhen(tr,Ref(C,-1)))/ValueWhen(tr,C);
    ls1=IIf(dls1>=Vl,ls1,Null);
    ls2=IIf(dls2>=Vl,ls2,Null);
    ls3=IIf(dls3>=Vl,ls3,Null);
    hs1=IIf(dhs1<=Vh,hs1,Null);
    hs2=IIf(dhs2<=Vh,hs2,Null);
    hs3=IIf(dhs3<=Vh,hs3,Null);
}
ls2a=IIf(BarsSince(tr)<=nbar*fact,ls2,Null);
ls2b=IIf(BarsSince(tr)>nbar*fact,ls2,Null);
ls3=IIf(BarsSince(tr)<=nbar*fact,ls3,Null);
hs2a=IIf(BarsSince(pk)<=nbar*fact,hs2,Null);
hs2b=IIf(BarsSince(pk)>nbar*fact,hs2,Null);
hs3=IIf(BarsSince(pk)<=nbar*fact,hs3,Null);
_SECTION_END();

_SECTION_BEGIN("Chart Colors");
SetChartBkColor(ParamColor("Background Color",ColorRGB(0,0,0)));
SetChartOptions(0,chartShowDates);
SetBarFillColor(IIf(C>O,ParamColor("Candle UP Color", colorGreen),IIf(C<=O,ParamColor("Candle Down Color", colorRed),colorLightGrey)));
Plot(C,"Price",IIf(C>O,ParamColor("Wick UP Color", colorDarkGreen),IIf(C<=O,ParamColor("Wick Down Color", colorDarkRed),colorLightGrey)),64,0,0,0);
Plot(pkh,"",colorRed,styleThick,0,0,-1);
Plot(trl,"",colorBrightGreen,styleThick,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);
Plot(ls1,"\nLower Trendline",colorBrightGreen,styleLine|styleNoRescale,0,0,-1);
Plot(ls2a,"",colorLightGrey,styleNoLine|styleDots|styleThick|styleNoRescale,0,0,-1);
Plot(ls2b,"",colorDarkGreen,styleNoLine|styleDots|styleThick|styleNoRescale,0,0,-1);
Plot(ls3,"",colorDarkGreen,styleNoLine|styleDots|styleThick|styleNoRescale,0,0,-1);
Plot(hs1,"\nUpper Trendline",colorRed,styleLine|styleNoRescale,0,0,-1);
Plot(hs2a,"",colorLightGrey,styleNoLine|styleDots|styleThick|styleNoRescale,0,0,-1);
Plot(hs2b,"",colorOrange,styleNoLine|styleDots|styleThick|styleNoRescale,0,0,-1);
Plot(hs3,"",colorOrange,styleNoLine|styleDots|styleThick|styleNoRescale,0,0,-1);
_SECTION_END();

if(showSignals)
{
Buy=( (!IsEmpty(Ref(hs2b,-1)) AND Ref(C<hs2b,-1)) AND (!IsEmpty(hs2b) AND C>hs2b) )
OR ( (!IsEmpty(Ref(hs3,-1)) AND Ref(C<hs3,-1)) AND (!IsEmpty(hs3) AND C>hs3) )
OR ( (!IsEmpty(Ref(hs2b,-1)) AND Ref(C<hs2b,-1)) AND (!IsEmpty(hs3) AND C>hs3) );
Buy=ExRem(Buy,tr OR pk);
BuyPrice=C;

Short=( (!IsEmpty(Ref(ls2b,-1)) AND Ref(C>ls2b,-1)) AND (!IsEmpty(ls2b) AND C<ls2b) )
OR ( (!IsEmpty(Ref(ls3,-1)) AND Ref(C>ls3,-1)) AND (!IsEmpty(ls3) AND C<ls3) )
OR ( (!IsEmpty(Ref(ls2b,-1)) AND Ref(C>ls2b,-1)) AND (!IsEmpty(ls3) AND C<ls3) );
Short=ExRem(Short,tr OR pk);
ShortPrice=C;
PlotShapes(IIf(Buy,shapeSmallUpTriangle,shapeNone),colorGreen,0,L,-15);
PlotShapes(IIf(Buy,shapeSmallCircle,shapeNone),colorWhite,0,BuyPrice,0);
PlotShapes(IIf(Short,shapeSmallDownTriangle,shapeNone),colorRed,0,H,-15);
PlotShapes(IIf(Short,shapeSmallCircle,shapeNone),colorWhite,0,ShortPrice,0);
}

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;

_SECTION_BEGIN("Label");
disp=ParamToggle("Display labels","Off|On",1);
dxhm=Param("Shift X Highs (Margin)",14,-100,100,1);
dxlm=Param("Shift X Lows (Margin)",10,-100,100,1);
dxh=Param("Shift X Highs",0,-100,100,1);
dxl=Param("Shift X Lows",0,-100,100,1);
dyhm=Param("Shift Y Highs (Margin)",5,-100,100,1);
dylm=Param("Shift Y Lows (Margin)",3,-100,100,1);
dyh=Param("Shift Y Highs",18,-100,100,1);
dyl=Param("Shift Y Lows",29,-100,100,1);
hm=Param("Marging High",30,-100,100,1);
lm=Param("Margin Low",30,-100,100,1);

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;
}
if(disp)
{
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;

PlotShapes(shapeHollowCircle*lh,ColorRGB(255,193,193),0,H,10);
PlotShapes(shapeHollowCircle*hl,ColorRGB(202,255,112),0,L,-10);

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);

for(i=0;i<AllVisibleBars;i++)
{
    if(ll[i+fvb] AND L[i+fvb]>LowMargin) PlotText("LL",i+fvb+dxll,L[i+fvb]-dyll,colorWhite,colorBlack);
    if(ll[i+fvb] AND L[i+fvb]<=LowMargin) PlotText("LL",i+fvb+dxll+dxllm,L[i+fvb]-dyllm,colorWhite,colorBlack);
    if(hl[i+fvb] AND L[i+fvb]>LowMargin) PlotText("HL",i+fvb+dxll,L[i+fvb]-dyll,colorWhite,colorBlack);
    if(hl[i+fvb] AND L[i+fvb]<=LowMargin) PlotText("HL",i+fvb+dxll+dxllm,L[i+fvb]-dyllm,colorWhite,colorBlack);
    if(db[i+fvb] AND L[i+fvb]>LowMargin) PlotText("DB",i+fvb+dxll,L[i+fvb]-dyll,colorWhite,colorBlack);
    if(db[i+fvb] AND L[i+fvb]<=LowMargin) PlotText("DB",i+fvb+dxll+dxllm,L[i+fvb]-dyllm,colorWhite,colorBlack); 
    if(hh[i+fvb] AND H[i+fvb]<HighMargin) PlotText("HH",i+fvb+dxhh,H[i+fvb]+dyhh,colorWhite,colorBlack);
    if(hh[i+fvb] AND H[i+fvb]>=HighMargin) PlotText("HH",i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm,colorWhite,colorBlack);
    if(lh[i+fvb] AND H[i+fvb]<HighMargin) PlotText("LH",i+fvb+dxhh,H[i+fvb]+dyhh,colorWhite,colorBlack);
    if(lh[i+fvb] AND H[i+fvb]>=HighMargin) PlotText("LH",i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm,colorWhite,colorBlack);    
    if(dt[i+fvb] AND H[i+fvb]<HighMargin) PlotText("DT",i+fvb+dxhh,H[i+fvb]+dyhh,colorWhite,colorBlack);
    if(dt[i+fvb] AND H[i+fvb]>=HighMargin) PlotText("DT",i+fvb+dxhh+dxhhm,H[i+fvb]+dyhhm,colorWhite,colorBlack);
}
Plot(tr,"",ColorRGB(0,100,0),styleHistogram|styleDashed|styleOwnScale|styleNoLabel,0,1,0);
Plot(pk,"",ColorRGB(100,0,0),styleHistogram|styleDashed|styleOwnScale|styleNoLabel,0,1,0);

}
_SECTION_END();