Darvas Box for Amibroker (AFL)

Darvas Box

_SECTION_BEGIN("Darvas Box");
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open= %g High= %g Low= %g Close= %g (%.1f%%) Volume= " + WriteVal( V/1, 1.0 ) +
"\n"+"{{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )) ));

Plot( C, "Close", ParamColor("Color", colorPaleTurquoise ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() );


box1=0;
box2=0;
SetBarsRequired(10000,10000);
procedure fillDarvas(start,end,swap,top, bottom )
{
for ( j = start; j < end; j++)
{
if( box1[j] == swap)
box1[j]= top ;
else
box1[j]= bottom;

if(box2[j] == swap)
box2[j]= bottom ;
else
box2[j]= top;
}
}

BoxArr1 = 0;
BoxArr2 = 0;
StateArray = 0;
DBuy = 0;
DSell = 0;
TopArray = 0;
BotArray = 0;
tick=0;

BoxTop = High[0];
BoxBot = Low[0];
swap=0;
state = 0;
BoxStart = 0;

for (i=0; i<BarCount; i++)
{
if (state==5)
{
TopArray[i]=BoxTop;
BotArray[i]=BoxBot;
if (Low[i]<(BoxBot*(1-tick/100)) || High[i]>(BoxTop*(1+tick/100)))
{
fillDarvas(BoxStart,i,swap,BoxTop,BoxBot);

state = 1;
swap = !swap;
BoxTop = High[i];
BoxStart = i;
}
}
else
{
if (High[i]<BoxTop)
{
if ((state<3) || (Low[i]>BoxBot))
{
state++;
}
else
{
state=3;
}
if (state==3)
BoxBot=Low[i];
}
else
{
state=1;
BoxTop=High[i];
}
}
StateArray[i] = state;
}

fillDarvas(BoxStart,BarCount,swap,BoxTop,BoxBot);
Buy=Cover=H>Ref(box1,-1) AND H>Ref(box2,-1) AND Ref(statearray,-1)==5;
Short=Sell=L<Ref(box1,-1) AND L<Ref(box2,-1) AND Ref(statearray,-1)==5;



Plot( box1,"\n"+ "Resistance : " , colorLime, styleDots );
Plot( box2,"\n"+ " Support : " , colorred, styleDots );


GfxSetOverlayMode(1);
GfxSelectFont("Aparajita", Status("pxheight")/10 );
GfxSetTextAlign( 6 );// center alignment
GfxSetTextColor( ColorHSB( 75, 75, 75 ) );
GfxSetBkMode(0); // transparent
GfxTextOut( Name(), Status("pxwidth")/2, Status("pxheight")/30 );




_SECTION_END();