KPL SWING for Amibroker (AFL)

//PATRICK DOHERTY//
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) Vol " +WriteVal( V, 1.0 ) +"
{{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )) ));
H1=SelectedValue( TimeFrameGetPrice( "H", inDaily, -1 ));
L1=SelectedValue(TimeFrameGetPrice( "L", inDaily, -1 ));
C1=SelectedValue(TimeFrameGetPrice( "C", inDaily, -1 ));
/*PIVOT Calculation*/
p = ( H1+ L1 + C1 )/3;
s1 = (2*p)-H1;
r1 = (2*p)-L1;
s2 = p -(H1 - L1);
s3 = S1 - (H1-L1);
r2 = p +(H1 - L1);
r3 = R1 +(H1-L1);
 
Plot (p,"Pivot",25,styleDots);
Plot (r1,"R1",12,1);
Plot (r2,"R2",12,1);
Plot (r3,"R3",12,1);
Plot (s1,"S1",3,1);
Plot (s2,"S2",3,1);
Plot (s3,"S3",3,1);
X=Cross(C,p);
Z=Cross(p,C);
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_SECTION_END();


//---- KPL SWING
HaClose = (O+H+L+C)/4;
HaOpen = AMA( Ref( HaClose, -1 ), 0.8);
HaHigh = Max( H, Max( HaClose, HaOpen ) );
HaLow = Min( L, Min( HaClose, HaOpen ) );
xDiff = (HaHigh - Halow) * IIf(StrFind(Name(),"JPY"),100,10000);
barcolor = IIf(HaClose >= HaOpen,colorWhite,colorWhite);
if( ParamToggle("Plot Heikin-Ashi", "No,Yes", 1 ) )
   PlotOHLC( HaOpen, HaHigh, HaLow, HaClose, "Heikin Ashi " + Name(), colorWhite, styleCandle );
else
 Plot( C, "Regular candles " + Name(), colorWhite, styleCandle );
j=Haclose;

//=======================================================================================================================
//=========================Indicator==============================================================================================

_SECTION_BEGIN("Swing10");
//Copyright Kamalesh Langote. Email:kpl@vfmdirect.com. More details at http://www.vfmdirect.com/kplswing
//Save indicator as "kplswing.afl" in C: program files > Amibroker > Formulas > Custom folder and then drap and drop on price chart
no=Param( "Swing", 1, 1, 55 );
tsl_col=ParamColor( "Color", colorWhite);
 
res=HHV(H,no);
sup=LLV(L,no);
avd=IIf(C>Ref(res,-1),1,IIf(C<Ref(sup,-1),-1,0));
avn=ValueWhen(avd!=0,avd,1);
tsl=IIf(avn==1,sup,res);
 
Plot(tsl, _DEFAULT_NAME(), tsl_col, styleStaircase); // or styleaArea
 
Buy=Cross(C,tsl);
Sell=Cross(tsl,C);
PlotShapes( IIf( Buy, shapeUpArrow, shapeNone ), colorBrightGreen, layer = 0,yposition = HaLow, offset = -15);
PlotShapes( IIf( Sell, shapeDownArrow, shapeNone ), colorRed, layer = 0, yposition = HaHigh, offset = -15);

_SECTION_END();