Download S/R type code For Amibroker (AFL)

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3 / 5 (Votes 6)

amibroker, support, resistance

code written while answering a question on Amibroker Yahoo board. Posted here mainly to exchange AFL coding skills and not sure if it will make you any money. Code has 2 modes of displaying S/R levels based on fractal pivots. Further multiple time frames can be used, meaning when you display 1 hour data you can set the time frame in the parameter window to e.g. 120 min so the pivots are calculated using the 2 hour time frame. Play with the parameter window a bit to see what it does.

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// AFL code by Edward Pottasch, Jan 2013
// Oz weekly pivots: http://i1145.photobucket.com/albums/o515/Austtrade/SupRes_zpsbebc3ab9.png
// Added toggle to log scale for Y-axis
 
RequestTimedRefresh(0.1,True); 
xx=BarIndex();x=xx;Lx=LastValue(x);
nbar=Param("N Pivot Bars",5,2,50,1); 
tf=Param("Time Frame (min)",inWeekly/60,1,inWeekly/60,1);tfrm=in1Minute*tf;
CleanPivots=ParamToggle("Use Clean Pivots","Off|On",1);
PivotSymmetry=ParamToggle("Use Symmetric Pivots","Off|On",0);
displayMode=ParamToggle("Display Mode","Classic|Alternative",1);
logscale=ParamToggle("Axis type","Linear|Logarithmic",0);
 
SetChartOptions(0,chartShowDates);
if(logscale) SetChartOptions(2,chartLogarithmic,chartGridMiddle|chartGridMargins); 
else SetChartOptions(3,chartLogarithmic,!(chartGridMiddle|chartGridMargins));  
 
procedure alternate1_proc(pk,tr,px0,px1,px2,ph0,ph1,ph2,tx0,tx1,tx2,tl0,tl1,tl2)
{
    global pkh;
    global trh;
     
    pk=IIf((px0==px1 AND px2>tx1 AND ph1<ph2) 
    OR (tx0==tx1 AND px1<px0 AND px1>tx0 AND ph1<=ph0)
    OR (px0>px1 AND px1<tx0 AND px2>tx1 AND ph1<ph2)
    OR (px0>px1 AND px0<tx0 AND px1>tx1 AND ph1<ph0)
    OR (ph1==ph2 AND px2>tx1)
    OR (px1==tx1 AND px2>tx2),False,pk);
 
    tr=IIf((tx0==tx1 AND tx2>px1 AND tl1>tl2) 
    OR (px0==px1 AND tx1<tx0 AND tx1>px0 AND tl1>=tl0)
    OR (tx0>tx1 AND tx1<px0 AND tx2>px1 AND tl1>tl2)
    OR (tx0>tx1 AND tx0<px0 AND tx1>px1 AND tl1>tl0)
    OR (tl1==tl2 AND tx2>px1)
    OR (px1==tx1 AND tx2>px2),False,tr);
     
    pkh=pk;trh=tr;
}
 
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);
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)
{
    alternate1_proc(pk,tr,px0,px1,px2,ph0,ph1,ph2,tx0,tx1,tx2,tl0,tl1,tl2);
    pk=pkh;tr=trh;
     
    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);   
     
    alternate1_proc(pk,tr,px0,px1,px2,ph0,ph1,ph2,tx0,tx1,tx2,tl0,tl1,tl2);
    pk=pkh;tr=trh;
     
    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);
}
 
GraphXSpace=5;SetChartBkColor(ColorRGB(0,0,0));
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;
 
function GetVisibleBarCount() 
{
    lvb=Status("lastvisiblebar");
    fvb=Status("firstvisiblebar");
    return Min(lvb-fvb,BarCount-fvb);
} 
function GfxConvertBarToPixelX(bar) 
{ 
    lvb=Status("lastvisiblebar"); 
    fvb=Status("firstvisiblebar"); 
    pxchartleft=Status("pxchartleft"); 
    pxchartwidth=Status("pxchartwidth"); 
    return Nz(pxchartleft+bar*pxchartwidth/(lvb-fvb+1)); 
} 
function GfxConvertValueToPixelY(value,logscale) 
{
    local Miny,Maxy,pxchartbottom,pxchartheight; 
    Miny=Status("axisminy");
    Maxy=Status("axismaxy");
    pxchartbottom=Status("pxchartbottom");
    pxchartheight=Status("pxchartheight");
    if(logscale) rv=Nz(pxchartbottom-floor(0.5+(log(value)-log(Miny))*pxchartheight/(log(maxy)-log(miny))));
    else rv=Nz(pxchartbottom-floor(0.5+(Value-Miny)*pxchartheight/(Maxy-Miny)));
    return rv;
} 
AllVisibleBars=GetVisibleBarCount();
fvb=Status("firstvisiblebar");
 
for(i=0;i<AllVisibleBars;i++) 
{
    DisplayRes=1;
    DisplaySup=1;
    lvix=i+fvb;
    if(pk[lvix])
    {
        if(displayMode)
        {
            hval=H[lvix];
            for(j=i;j<AllVisibleBars;j++)
            {
                lvjx=j+fvb;
                if(H[lvjx]>hval)
                {
                    DisplayRes=0;
                    break;
                }
            }
        }
        if(DisplayRes)
        {
            GfxSelectPen(ColorRGB(100,0,0),3,0);
            GfxMoveTo(GfxConvertBarToPixelX(i),GfxConvertValueToPixelY(H[lvix],logscale));
            GfxLineTo(GfxConvertBarToPixelX(AllVisibleBars-1),GfxConvertValueToPixelY(H[lvix],logscale));
            GfxSelectFont("Tahoma",8,650);GfxSetBkColor(ColorRGB(200,0,0));GfxSetTextColor(colorWhite);
            GfxTextOut(""+H[lvix],GfxConvertBarToPixelX(AllVisibleBars+1),GfxConvertValueToPixelY(H[lvix],logscale));           
        }
    }
    if(tr[lvix])
    {
        if(displayMode)
        {
            lval=L[lvix];
            for(j=i;j<AllVisibleBars;j++)
            {
                lvjx=j+fvb;
                if(L[lvjx]<lval)
                {
                    DisplaySup=0;
                    break;
                }
            }
        }   
        if(DisplaySup)
        {   
            GfxSelectPen(ColorRGB(0,0,100),3,0);
            GfxMoveTo(GfxConvertBarToPixelX(i),GfxConvertValueToPixelY(L[lvix],logscale));
            GfxLineTo(GfxConvertBarToPixelX(AllVisibleBars-1),GfxConvertValueToPixelY(L[lvix],logscale));
            GfxSelectFont("Tahoma",8,650);GfxSetBkColor(ColorRGB(0,0,200));GfxSetTextColor(colorWhite);
            GfxTextOut(""+L[lvix],GfxConvertBarToPixelX(AllVisibleBars+1),GfxConvertValueToPixelY(L[lvix],logscale));
        }
    }   
}

1 comments

1. lemefr

almost 12 years ago

Great S/R code! Thank you very much… trying to use it in Daily Time Frame…I think it’s ok…

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S/R type code for Amibroker (AFL)
empottasch
over 12 years ago
Amibroker (AFL)

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S/R type code for Amibroker (AFL) empottasch over 12 years ago Amibroker (AFL)

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S/R type code for Amibroker (AFL)
empottasch
over 12 years ago
Amibroker (AFL)