Supertrend AFL Ammibroker

[Raj05]

Hi all,

I am new to AFL can you guys help me with my AFL pasted below:
I need to know Buy Sell Logic and few very basic things one must know to start understanding an AFL Code.

Thanks for the help and the time you are about to invest.

AFL Pasted

_SECTION_BEGIN("SuperTrend");
SetBarsRequired(100000,0);
GraphXSpace = 15;
SetChartOptions(0,chartShowArrows|chartShowDates);
SetChartBkColor(ParamColor("bkcolor",ColorRGB(0,0, 0)));
GfxSetBkMode(0);
GfxSetOverlayMode(1);
SetBarFillColor(IIf(C>O,ParamColor("Candle UP Color", colorGreen),IIf(C<=O,ParamColor("Candle Down Color", colorRed),colorLightGrey)));
Plot(C,"\nPrice",IIf(C>O,ParamColor("Wick UP Color", colorDarkGreen),IIf(C<=O,ParamColor("Wick Down Color", colorDarkRed),colorLightGrey)),64,0,0,0,0);

SetTradeDelays(1,1,1,1);


//////////////////////////////////////////
//Calculates Seconds Left for New Bar //
/////////////////////////////////////////


function GetSecondNum()
{
Time = Now( 4 );
Seconds = int( Time % 100 );
Minutes = int( Time / 100 % 100 );
Hours = int( Time / 10000 % 100 );
SecondNum = int( Hours * 60 * 60 + Minutes * 60 + Seconds );
return SecondNum;
}
RequestTimedRefresh( 1 );
TimeFrame = Interval();
SecNumber = GetSecondNum();
Newperiod = SecNumber % TimeFrame == 0;
SecsLeft = SecNumber - int( SecNumber / TimeFrame ) * TimeFrame;
SecsToGo = TimeFrame - SecsLeft;

x=Param("xposn",50,0,1000,1);
y=Param("yposn",380,0,1000,1);

GfxSelectSolidBrush( ColorRGB( 230, 230, 230 ) );
GfxSelectPen( ColorRGB( 230, 230, 230 ), 2 );
if ( NewPeriod )
{
GfxSelectSolidBrush( colorYellow );
GfxSelectPen( colorYellow, 2 );
Say( "New period" );
}
//GfxRoundRect( x+45, y+40, x-3, y-2, 0, 0 );
//GfxSetBkMode(1);
GfxSelectFont( "Arial", 14, 700, False );
GfxSetTextColor( colorRed );
GfxTextOut( "Time Left :"+SecsToGo+"", x, y );

////////////////////////////////////////////


_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));

Factor=Param("Factor",4,1,10,1);
Pd=Param("ATR Periods",6,1,100,1);
Up=(H+L)/2+(Factor*ATR(Pd));
Dn=(H+L)/2-(Factor*ATR(Pd));
iATR=ATR(Pd);
TrendUp=TrendDown=Null;
trend[0]=1;
changeOfTrend=0;
flag=flagh=0;

for (i = 1; i <BarCount-1; i++) {
TrendUp = Null;
TrendDown = Null;

trend=1;


if (Close>Up[i-1]) {
trend=1;
if (trend[i-1] == -1) changeOfTrend = 1;

}
else if (Close<Dn[i-1]) {
trend=-1;
if (trend[i-1] == 1) changeOfTrend = 1;
}
else if (trend[i-1]==1) {
trend=1;
changeOfTrend = 0;
}
else if (trend[i-1]==-1) {
trend=-1;
changeOfTrend = 0;
}

if (trend<0 && trend[i-1]>0) {
flag=1;
}
else {
flag=0;
}

if (trend>0 && trend[i-1]<0) {
flagh=1;
}
else {
flagh=0;
}

if (trend>0 && Dn<Dn[i-1]){
Dn=Dn[i-1];
}

if (trend<0 && Up>Up[i-1])
{ Up=Up[i-1];
}

if (flag==1)
{ Up=(H+L)/2+(Factor*iATR);;
}
if (flagh==1)
{ Dn=(H+L)/2-(Factor*iATR);;
}
if (trend==1) {
TrendUp=Dn;
if (changeOfTrend == 1) {
TrendUp[i-1] = TrendDown[i-1];
changeOfTrend = 0;
}
}
else if (trend==-1) {
TrendDown=Up;
if (changeOfTrend == 1) {
TrendDown[i-1] = TrendUp[i-1];
changeOfTrend = 0;
}
}
}

Plot(TrendUp,"Trend",colorGreen);
Plot(TrendDown,"Down",colorRed);

Buy = trend==1;
Sell=trend==-1;

Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
Short=Sell;
Cover=Buy;


BuyPrice=ValueWhen(Buy,C);
SellPrice=ValueWhen(Sell,C);
ShortPrice=ValueWhen(Short,C);
CoverPrice=ValueWhen(Cover,C);


Title = EncodeColor(colorWhite)+ "Super Trend AFL code from www.marketcalls.in" + " - " + Name() + " - " + EncodeColor(colorRed)+ Interval(2) + EncodeColor(colorWhite) +
" - " + Date() +" - "+"\n" +EncodeColor(colorRed) +"Op-"+O+" "+"Hi-"+H+" "+"Lo-"+L+" "+
"Cl-"+C+" "+ "Vol= "+ WriteVal(V)+"\n"+
EncodeColor(colorLime)+
WriteIf (Buy , " GO LONG / Reverse Signal at "+C+" ","")+
WriteIf (Sell , " EXIT LONG / Reverse Signal at "+C+" ","")+"\n"+EncodeColor(colorYellow)+
WriteIf(Sell , "Total Profit/Loss for the Last Trade Rs."+(C-BuyPrice)+"","")+
WriteIf(Buy , "Total Profit/Loss for the Last trade Rs."+(SellPrice-C)+"","");

PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorGreen, 0, L, Offset=-40);
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorLime, 0,L, Offset=-50);
PlotShapes(IIf(Buy, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-45);
PlotShapes(IIf(Short, shapeSquare, shapeNone),colorRed, 0, H, Offset=40);
PlotShapes(IIf(Short, shapeSquare, shapeNone),colorOrange, 0,H, Offset=50);
PlotShapes(IIf(Short, shapeDownArrow, shapeNone),colorWhite, 0,H, Offset=-45);

TrendSL=IIf(trend==1,TrendUp,TrendDown);

for(i=BarCount-1;i>1;i--)
{
if(Buy == 1)
{
entry = C;
sig = "BUY";
sl = TrendSL;
tar1 = entry + (entry * .0050);
tar2 = entry + (entry * .0092);
tar3 = entry + (entry * .0179);

bars = i;
i = 0;
}
if(Sell == 1)
{
sig = "SELL";
entry = C;
sl = TrendSL;
tar1 = entry - (entry * .0050);
tar2 = entry - (entry * .0112);
tar3 = entry - (entry * .0212);


bars = i;
i = 0;
}
}
Offset = 20;
Clr = IIf(sig == "BUY", colorLime, colorRed);
ssl = IIf(bars == BarCount-1, TrendSL[BarCount-1], Ref(TrendSL, -1));
sl = ssl[BarCount-1];


Plot(LineArray(bars-Offset, tar1, BarCount, tar1,1), "", Clr, styleLine|styleDots, Null, Null, Offset);
Plot(LineArray(bars-Offset, tar2, BarCount, tar2,1), "", Clr, styleLine|styleDots, Null, Null, Offset);
Plot(LineArray(bars-Offset, tar3, BarCount, tar3,1), "", Clr, styleLine|styleDots, Null, Null, Offset);

//Plot(LineArray(bars-Offset, sl, BarCount, sl,1), "", colorDarkRed, styleLine|styleLine, Null, Null, Offset);
//Plot(LineArray(bars-Offset, entry, BarCount, entry,1), "", colorGreen, styleLine|styleLine, Null, Null, Offset);

/*
for (i=bars; i <BarCount;i++)
{
PlotText(""+sig+"@"+entry, BarCount-5,entry,Null,colorBlue);
PlotText("T1@"+tar1,BarCount-5,tar1,Null,Clr);PlotText("T2@"+tar2,BarCount-5,tar2,Null,Clr);PlotText ("T3@"+tar3,BarCount-5,tar3,Null,Clr);

}*/

messageboard = ParamToggle("Message Board","Show|Hide",1);
if (messageboard == 1 )
{
GfxSelectFont( "Tahoma", 13, 100 );
GfxSetBkMode( 1 );
GfxSetTextColor( colorWhite );

if ( sig =="BUY")
{
GfxSelectSolidBrush( colorBlue ); // this is the box background color
}
else
{
GfxSelectSolidBrush( colorRed ); // this is the box background color
}
pxHeight = Status( "pxchartheight" ) ;
xx = Status( "pxchartwidth");
Left = 1100;
width = 310;
x = 5;
x2 = 290;

y = pxHeight;

GfxSelectPen( colorGreen, 1); // broader color
GfxRoundRect( x, y - 98, x2, y , 7, 7 ) ;
GfxTextOut( ( "Marketcalls - Supertrend"),13,y-100);
GfxTextOut( (" "),27,y-100);
GfxTextOut( ("Last " + sig + " Signal came " + (BarCount-bars-1) * Interval()/60 + " mins ago"), 13, y-80) ; // The text format location
GfxTextOut( ("" + WriteIf(sig =="BUY",sig + " @ ",sig + " @") + " : " + entry), 13, y-60);
GfxTextOut( ("Trailing SL : " + TrendSL + " (" + WriteVal(IIf(sig == "SELL",entry-sl,sl-entry), 2.2) + ")"), 13, y-40);
/*GfxTextOut( ("TGT:1 : " + tar1), 13, y -80);
GfxTextOut( ("TGT:2 : " + tar2), 13,y-60);
GfxTextOut( ("TGT:3 : " + tar3), 13,y-40);*/
GfxTextOut( ("Current P/L : " + WriteVal(IIf(sig == "BUY",(C-entry),(entry-C)),2.2)), 13, y-22);;




//Magfied Market Price
FS=Param("Font Size",30,11,100,1);
GfxSelectFont("Times New Roman", FS, 700, True );
GfxSetBkMode( colorWhite );
GfxSetTextColor( ParamColor("Color",colorGreen) );
Hor=Param("Horizontal Position",940,1,1200,1);
Ver=Param("Vertical Position",12,1,830,1);
GfxTextOut(""+C, Hor , Ver );
YC=TimeFrameGetPrice("C",inDaily,-1);
DD=Prec(C-YC,2);
xx=Prec((DD/YC)*100,2);
GfxSelectFont("Times New Roman", 11, 700, True );
GfxSetBkMode( colorBlack );
GfxSetTextColor(ParamColor("Color",colorYellow) );
GfxTextOut(""+DD+" ("+xx+"%)", Hor , Ver+45 );

}

_SECTION_END();
/*
_SECTION_BEGIN("Time Left");
function GetSecondNum()
{
Time = Now( 4 );
Seconds = int( Time % 100 );
Minutes = int( Time / 100 % 100 );
Hours = int( Time / 10000 % 100 );
SecondNum = int( Hours * 60 * 60 + Minutes * 60 + Seconds );
return SecondNum;
}
RequestTimedRefresh( 1 );
TimeFrame = Interval();
SecNumber = GetSecondNum();
Newperiod = SecNumber % TimeFrame == 0;
SecsLeft = SecNumber - int( SecNumber / TimeFrame ) * TimeFrame;
SecsToGo = TimeFrame - SecsLeft;

x=Param("xposn",50,0,1000,1);
y=Param("yposn",380,0,1000,1);

GfxSelectSolidBrush( ColorRGB( 230, 230, 230 ) );
GfxSelectPen( ColorRGB( 230, 230, 230 ), 2 );
if ( NewPeriod )
{
GfxSelectSolidBrush( colorYellow );
GfxSelectPen( colorYellow, 2 );
Say( "New period" );
}
//GfxRoundRect( x+45, y+40, x-3, y-2, 0, 0 );
//GfxSetBkMode(1);
GfxSelectFont( "Arial", 14, 700, False );
GfxSetTextColor( colorRed );
GfxTextOut( "Time Left :"+SecsToGo+"", x, y );
_SECTION_END(); */

 

[vijkris]

hi,
this supertrend indicator is easy to use. marketcalls.in has made it user friendly, alongwith buy/sell signal.
to make it user friendly, afl is a bit complicated.
lot of loops has been used which is difficult for non- programmers to understand. I belong to non-programmers as well.
Array functions in amibroker is easy to understand.
hope u find this useful.

 

[Raj05]

Thanks for the reply Vijkris, I will go through the links you shared.