_SECTION_BEGIN("NICK MA Swing + heikin pivots");
SetBarsRequired(200,0);

GraphXSpace = 5;
SetChartOptions(0,chartShowArrows|chartShowDates);
k =  Optimize("K",Param("K",1,0.25,5,0.25),0.25,5,0.25);
Per= Optimize("atr",Param("atr",4,3,20,1),3,20,1);
HACLOSE=(O+H+L+C)/4;
HaOpen = AMA( Ref( HaClose,  -1 ),  0.5 );
HaHigh = Max( H,  Max( HaClose,  HaOpen ) );
HaLow = Min( L,  Min( HaClose,  HaOpen ) );
PlotOHLC( HaOpen, HaHigh, HaLow, HaClose, "" + Name(), colorWhite, styleCandle | styleNoLabel );
j=Haclose;

//=======================================================================================================================
//=========================Indicator==============================================================================================
f=ATR(14);

rfsctor = WMA(H-L, Per);

revers = k * rfsctor;

Trend = 1;  
NW[0] = 0;  


for(i = 1; i < BarCount; i++)
{
 if(Trend[i-1] == 1)                
 {
  if(j[i] < NW[i-1])                 
  {
   Trend[i] = -1;                   
   NW[i] = j[i] + Revers[i];        
  }
  else                              
  {
   Trend[i] = 1;
   if((j[i] - Revers[i]) > NW[i-1])
   {
    NW[i] = j[i] - Revers[i]; 
   }
   else
   {
    NW[i] = NW[i-1];
   }
  } 
 }
 if(Trend[i-1] == -1)               
 {
  if(j[i] > NW[i-1])                
  {
   Trend[i] = 1;                    
   NW[i] = j[i] - Revers[i];        
  }
  else                              
  {
   Trend[i] = -1;
   if((j[i] + Revers[i]) < NW[i-1]) 
   {
    NW[i] = j[i] + Revers[i]; 
   }
   else
   {
    NW[i] = NW[i-1];
   }
  }
 }
}

//===============system================

_SECTION_BEGIN("ema5,13sound");
x = EMA(Close,5);
y = EMA(Close,13);
Plot(EMA(Close,5),"",colorBrightGreen,styleLine, styleThick);
Plot(EMA(Close,13),"",colorOrange,styleLine, styleThick);
XR=(EMA(Close,5) * (2 / 6 - 1) - EMA(Close,13) * (2 / 11 - 1)) / (2 / 6 - 2 / 11);


Buy=Cross(j,nw);
Cover=Cross(j,nw);
Sell=Cross(nw,j);
Short=Cross(nw,j);
SellPrice=ValueWhen(Sell,C,1);
BuyPrice=ValueWhen(Buy,C,1);
Long=Flip(Buy,Sell);
Shrt=Flip(Sell,Buy );
_SECTION_END();
//=================TITLE================================================================================================
_SECTION_BEGIN("Title");
if( Status("action") == actionIndicator ) 
(
Title = EncodeColor(colorWhite)+ "NICK MA Swing System" + " - " +  Name() + " - " + EncodeColor(colorRed)+ Interval(2) + EncodeColor(colorWhite) +
 "  - " + Date() +" - "+"\n" +EncodeColor(colorYellow) +"Op-"+O+"  "+"Hi-"+H+"  "+"Lo-"+L+"  "+
"Cl-"+C+"  "+ "Vol= "+ WriteVal(V)+"\n"+ 
EncodeColor(colorRed)+
WriteIf (Buy , " GO LONG / Reverse Signal at "+C+"  ","")+
WriteIf (Sell , " EXIT LONG / Reverse Signal at "+C+"  ","")+"\n"+EncodeColor(colorWhite)+
WriteIf(Sell , "Total Profit/Loss for the Last Trade Rs."+(C-BuyPrice)+"","")+
WriteIf(Buy  , "Total Profit/Loss for the Last trade Rs."+(SellPrice-C)+"","")+
WriteIf(Long AND NOT Buy, "Trade : Long - Entry price Rs."+(BuyPrice),"")+
WriteIf(shrt AND NOT Sell, "Trade : Short - Entry price Rs."+(SellPrice),"")+"\n"+ 
WriteIf(Long AND NOT Buy, "Current Profit/Loss Rs."+(C-BuyPrice)+"","")+
WriteIf(shrt AND NOT Sell, "Current Profit/Loss Rs."+(SellPrice-C)+"",""));
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorGreen, 0, L, Offset=-30);
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorLime, 0,L, Offset=-40);                      
PlotShapes(IIf(Buy, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-35); 
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);
PlotShapes(IIf(Cover, shapeSquare, shapeNone),colorGreen, 0, L, Offset=-30);
PlotShapes(IIf(Cover, shapeSquare, shapeNone),colorLime, 0,L, Offset=-40);                      
PlotShapes(IIf(Cover, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-35); 
PlotShapes(IIf(Sell, shapeSquare, shapeNone),colorRed, 0, H, Offset=40);
PlotShapes(IIf(Sell, shapeSquare, shapeNone),colorOrange, 0,H, Offset=50);                      
PlotShapes(IIf(Sell, shapeDownArrow, shapeNone),colorWhite, 0,H, Offset=-45);
AlertIf( Ref(Buy,-1), "SOUND C:\\Windows\\Media\\Windows XP Startup.wav", "Nick MA Buy", 2 );
AlertIf( Ref(Sell,-1), "SOUND C:\\Windows\\Media\\Ringin.wav", "Nick MA Sell", 2 );
_SECTION_END();

_SECTION_BEGIN("MA");
P = ParamField("Price field",-1);
Periods = Param("Periods", 8, 2, 200, 1 );
Plot( EMA( P, Periods ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ), ParamStyle("Style") | styleNoRescale ); 
_SECTION_END();

_SECTION_BEGIN("Mid MA");
P = ParamField("Price field",-1);
Periods = Param("Periods", 34, 2, 300, 1 );
Plot( EMA( P, Periods ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ), ParamStyle("Style") | styleNoRescale ); 
_SECTION_END();

_SECTION_BEGIN("Long MA");
P = ParamField("Price field",-1);
Periods = Param("Periods", 200, 2, 400, 1 );
Plot( EMA( P, Periods ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ), ParamStyle("Style") | styleNoRescale ); 
_SECTION_END();
_SECTION_END();

_SECTION_BEGIN("SAR");
acc = Param("Acceleration", 0.02, 0, 1, 0.001 );
accm = Param("Max. acceleration", 0.2, 0, 1, 0.001 );
Plot( SAR( acc, accm ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ), ParamStyle("Style", styleDots | styleNoLine, maskDefault | styleDots | styleNoLine ) );
_SECTION_END();
_SECTION_BEGIN("Sup / Res Lines");
RSIperiod	= 15;	// Param("RSI p",3,14,30,1);
Percent 		= 5;	//	Param("ZIG %",8,9,15,1);
EMAperiod 	= 2;	//Param("EMA p",4,5,10,1);
HHVperiod 	= 8;	//Param("HHV p",3,5,10,1);
NumLine 		= 2;	//Param("Num Lines",3,1,20,1);

Base = DEMA(RSI(RSIperiod),EMAperiod);


for( i = 1; i <= numline; i++ )
{
ResBase = LastValue(Peak(Base,Percent,i));
SupBase = LastValue(Trough(Base,Percent,i));
Plot(ValueWhen( ResBase==Base, HHV(H,HHVperiod) ), "Resist Level", colorRed, styleLine);
Plot(ValueWhen( supbase==Base, LLV(L,HHVperiod) ), "Support Level", colorGreen, styleLine);

}_SECTION_END();


_SECTION_BEGIN("heikin");

// Calculate Moving Average
MAPeriod = Param("MA Period", 15, 1, 100);
MAOpen = EMA(Open, MAPeriod);
MAHigh = EMA(High, MAPeriod);
MALow = EMA(Low, MAPeriod);
MAClose = EMA(Close, MAPeriod);

HaClose = (MAOpen + MAHigh + MALow + MAClose) / 4;
HaOpen = AMA(Ref(HaClose, -1), 0.5);

// for graph collapse
for(i = 0; i <= MAPeriod; i++)  {

HaClose[i] = Null;
/*
// same 
// HaOpen = (Ref(HaOpen, -1) + Ref(HaClose, -1)) / 2;
HaOpen[ 0 ] = HaClose[ 0 ]; 
for(i = 1; i < BarCount; i++) { 
    HaOpen[i] = (HaOpen[i - 1] + HaClose[i - 1]) / 2;
} 
*/

HaHigh = Max(MAHigh, Max(HaClose, HaOpen)); 
HaLow = Min(MALow, Min(HaClose, HaOpen)); 

// outs comments
"BarIndex = " + BarIndex();
"Open = " + Open;
"High = " + High;
"Low = " + Low;
"Close = "+ Close;
"HaOpen = " + HaOpen;
"HaHigh = " + HaHigh;
"HaLow = " + HaLow;
"HaClose = "+ HaClose;


  /* **********************************

Code to automatically identify pivots

********************************** */

// -- what will be our lookback range for the hh and ll?
farback=Param("How Far back to go",100,50,5000,10);
nBars = Param("Number of bars", 12, 5, 40);


// -- Create 0-initialized arrays the size of barcount

aHPivs = H - H;

aLPivs = L - L;

// -- More for future use, not necessary for basic plotting

aHPivHighs = H - H;

aLPivLows = L - L;

aHPivIdxs = H - H;

aLPivIdxs = L - L;

nHPivs = 0;

nLPivs = 0;

lastHPIdx = 0;

lastLPIdx = 0;

lastHPH = 0;

lastLPL = 0;

curPivBarIdx = 0;

// -- looking back from the current bar, how many bars 

// back were the hhv and llv values of the previous 

// n bars, etc.?

aHHVBars = HHVBars(H, nBars);

aLLVBars = LLVBars(L, nBars);

aHHV = HHV(H, nBars);

aLLV = LLV(L, nBars);

// -- Would like to set this up so pivots are calculated back from

// last visible bar to make it easy to "go back" and see the pivots

// this code would find. However, the first instance of 

// _Trace output will show a value of 0

aVisBars = Status("barvisible");

nLastVisBar = LastValue(Highest(IIf(aVisBars, BarIndex(), 0)));

_TRACE("Last visible bar: " + nLastVisBar);

// -- Initialize value of curTrend

curBar = (BarCount-1);

curTrend = "";

if (aLLVBars[curBar] < 

aHHVBars[curBar]) {

curTrend = "D";

}

else {

curTrend = "U";

}

// -- Loop through bars. Search for 

// entirely array-based approach

// in future version

for (i=0; i<farback; i++) {

curBar = (BarCount - 1) - i;

// -- Have we identified a pivot? If trend is down...

//if (aLLVBars[curBar] < aHHVBars[curBar]) {

// ... and had been up, this is a trend change

if (curTrend == "U") {

curTrend = "D";

// -- Capture pivot information

//curPivBarIdx = curBar - aLLVBars[curBar];

aLPivs[curPivBarIdx] = 1;

//aLPivLows[nLPivs] = L[curPivBarIdx];

//aLPivIdxs[nLPivs] = curPivBarIdx;

nLPivs++;

}

// -- or current trend is up

//} 
else {

if (curTrend == "D") {

curTrend = "U";

//curPivBarIdx = curBar - aHHVBars[curBar];

aHPivs[curPivBarIdx] = 1;

//aHPivHighs[nHPivs] = H[curPivBarIdx];

//aHPivIdxs[nHPivs] = curPivBarIdx;

nHPivs++;

}

// -- If curTrend is up...else...

} 

// -- loop through bars

} 

// -- Basic attempt to add a pivot this logic may have missed

// -- OK, now I want to look at last two pivots. If the most 

// recent low pivot is after the last high, I could

// still have a high pivot that I didn't catch

// -- Start at last bar

curBar = (BarCount-1);

candIdx = 0;

candPrc = 0;

lastLPIdx = aLPivIdxs[0];

lastLPL = aLPivLows[0];

lastHPIdx = aHPivIdxs[0];

lastHPH = aHPivHighs[0];

if (lastLPIdx > lastHPIdx) {

// -- Bar and price info for candidate pivot

candIdx = curBar - aHHVBars[curBar];

candPrc = aHHV[curBar]; 

if (

lastHPH < candPrc AND

candIdx > lastLPIdx AND

candIdx < curBar) {


// -- OK, we'll add this as a pivot...

aHPivs[candIdx] = 1;

// ...and then rearrange elements in the 

// pivot information arrays

for (j=0; j<nHPivs; j++) {

aHPivHighs[nHPivs-j] = aHPivHighs[nHPivs-

(j+1)];

aHPivIdxs[nHPivs-j] = aHPivIdxs[nHPivs-(j+1)];

}

aHPivHighs[0] = candPrc ;

aHPivIdxs[0] = candIdx;

nHPivs++;

} 

} else {


// -- Bar and price info for candidate pivot

candIdx = curBar - aLLVBars[curBar];

candPrc = aLLV[curBar]; 

if (

lastLPL > candPrc AND

candIdx > lastHPIdx AND

candIdx < curBar) {


// -- OK, we'll add this as a pivot...

aLPivs[candIdx] = 1;

// ...and then rearrange elements in the 

// pivot information arrays

for (j=0; j<nLPivs; j++) {

aLPivLows[nLPivs-j] = aLPivLows[nLPivs-(j+1)];

aLPivIdxs[nLPivs-j] = aLPivIdxs[nLPivs-(j+1)];

}

aLPivLows[0] = candPrc;

aLPivIdxs[0] = candIdx;

nLPivs++;

}

}

// -- Dump inventory of high pivots for debugging

/*

for (k=0; k<nHPivs; k++) {

_TRACE("High pivot no. " + k

+ " at barindex: " + aHPivIdxs[k] + ", " 

+ WriteVal(ValueWhen(BarIndex()==aHPivIdxs[k], 

DateTime(), 1), formatDateTime)

+ ", " + aHPivHighs[k]);

}

*/

// -- OK, let's plot the pivots using arrows

PlotShapes(

IIf(aHPivs==1, shapeDownArrow, shapeNone), colorRed, 0,

High, Offset=-15);

PlotShapes(

IIf(aLPivs==1, shapeUpArrow , shapeNone), colorBrightGreen, 0, 

Low, Offset=-15);

AlertIf( Ref(aLPivs==1,-1), "SOUND C:\\Windows\\Media\\Windows XP Startup.wav", "Heikin Buy ", 2 );
AlertIf( Ref(aHPivs==1,-1), "SOUND C:\\Windows\\Media\\Ringin.wav", "Heikin Sell", 2 );

 Buy=(aLPivs==1);
Cover=(aLPivs==1);
Sell=(aHPivs==1);
Short=(aHPivs==1);
SellPrice=ValueWhen(Sell,C,1);
BuyPrice=ValueWhen(Buy,C,1);
Long=Flip(Buy,Sell);
Shrt=Flip(Sell,Buy );
_SECTION_END();
//=================TITLE================================================================================================
_SECTION_BEGIN("Title");
if( Status("action") == actionIndicator ) 
(
Title = EncodeColor(colorLightBlue)+ "Heikin-Ashi pivot + NMA Swing system - Boxed arrows NMA buy-sell - Normal Arrows Heikin Pivot Buy-Sell" + " - " +  Name() + " - " + EncodeColor(colorRed)+ Interval(2) + EncodeColor(colorWhite) +
 "  - " + Date() +" - "+"\n" +EncodeColor(colorYellow) +"Op-"+O+"  "+"Hi-"+H+"  "+"Lo-"+L+"  "+
"Cl-"+C+"  "+ "Vol= "+ WriteVal(V)+"\n"+ 
EncodeColor(colorRed)+
WriteIf (Buy , " GO LONG / Reverse Signal at "+C+"  ","")+
WriteIf (Sell , " EXIT LONG / Reverse Signal at "+C+"  ","")+"\n"+EncodeColor(colorWhite)+
WriteIf(Sell , "Total Profit/Loss for the Last Trade Rs."+(C-BuyPrice)+"","")+
WriteIf(Buy  , "Total Profit/Loss for the Last trade Rs."+(SellPrice-C)+"","")+
WriteIf(Long AND NOT Buy, "Trade : Long - Entry price Rs."+(BuyPrice),"")+
WriteIf(shrt AND NOT Sell, "Trade : Short - Entry price Rs."+(SellPrice),"")+"\n"+ 
WriteIf(Long AND NOT Buy, "Current Profit/Loss Rs."+(C-BuyPrice)+"","")+
WriteIf(shrt AND NOT Sell, "Current Profit/Loss Rs."+(SellPrice-C)+"",""));
AlertIf( Ref(Buy, -1), "SOUND C:\\Windows\\Media\\Windows XP Startup.wav", "ActionIndicator Buy", 2 );
AlertIf( Ref(Sell, -1), "SOUND C:\\Windows\\Media\\Ringin.wav", "Action Indicator Sell", 2 );
_SECTION_END();

_SECTION_BEGIN("Shiree_Hanging Man bullish +bearish with volume");

BT = BBandTop( C, 20, 2 );
BB = BBandBot( C, 20, 2 );
X=(BT-BB);

RBuy=EMA(C,3)<EMA(C,10) AND C<EMA(C,3) AND ((O+C)/2)>L+0.7*(H-L) AND abs(O-C)<0.4*(H-L) AND V>MA(V,10) AND (H-L)>=0.8*MA((H-L),10) AND X>1.2*MA(X,10);
Rsell=EMA(C,3)>EMA(C,10) AND C>EMA(C,3) AND ((O+C)/2)<H-0.7*(H-L) AND abs(O-C)<0.4*(H-L) AND V>MA(V,10) AND (H-L)>=0.8*MA((H-L),10) AND X>1.2*MA(X,10);


PlotShapes(Rsell*shapeDownTriangle,colorCustom12, 0, High, Offset =-40);
PlotShapes(Rsell*shapeDigit5,colorCustom12, 0, High, Offset =55);

PlotShapes(RBuy*shapeDigit5,colorYellow, 0, High, Offset =-70);
PlotShapes(RBuy*shapeUpTriangle,colorYellow, 0, Low, Offset =-10);


Filter =Rbuy OR Rsell;

AddColumn( IIf(RBuy,1,IIf(Rsell,-1,Null)) ,"RBS",1.0,colorWhite,IIf(RBuy,colorDarkGreen,IIf( Rsell,colorRed,Null)));

_SECTION_END();

_SECTION_BEGIN("Double top detection");
//------------------------------------------------------------------------------
//
//  Formula Name:    Double top detection
//  Author/Uploader: Tomasz Janeczko 
//  E-mail:          tj@amibroker.com
//  Date/Time Added: 2001-06-16 08:45:38
//  Origin:          Created by Tomasz Janeczko
//  Keywords:        pattern,recognition,top,bottom
//  Level:           semi-advanced
//  Flags:           commentary
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=19
//  Details URL:     AmiBroker - AFL Library
//
//------------------------------------------------------------------------------
//
//  Detecting patterns is somewhat tricky thing mainly because you can be sure
//  about that only if the pattern is complete. This implies delay in detecting
//  patterns and/or formations and limits usefulness of automatic detection
//  formulas. Anyway I will try to show you how to write pattern recognition
//  formulas using AFL. In this article we will focus on detecting very well
//  known pattern - a double top / double bottom.
//
//  The double top is a major reversal pattern that forms after an extended
//  uptrend. As its name implies, the pattern is made up of two consecutive
//  peaks that are roughly equal, with a moderate trough in between. Although
//  there can be variations, the classic double top marks at least an
//  intermediate change, if not long-term change, in trend from bullish to
//  bearish. Many potential double tops can form along the way up, but until
//  key support is broken, a reversal cannot be confirmed. The whole formation
//  consists of the following parts: prior trend, first peak, trough, second
//  peak, decline from the peak, support break and then decline to the price
//  target. The pattern seems straightforward but there are many details to
//  watch out. For the purpose of this article I will use simplified model of
//  double top pattern that consists of double, roughly equal peaks and the
//  decline from the second peak. So, let's begin.
//
//  AmiBroker Formula Language provides built in functions for detecting peaks
//  and troughs. These functions are based on Zig( array, thresh ) function
//  which you can test by trying the follwing formula:
//
//  graph0 = close;
//
//  graph1= zig( close, 5 );
//
//  As you can see Zig() function determines major peaks and troughs using
//  percentage threshold given as a second parameter. The bigger threshold you
//  specify the more significant peaks and troughs are detected. The line
//  generated by Zig() function indentifies the main trend. There is one caveat
//  however: please take special attention using Zig() function in trading
//  systems because it looks in the future so you will get unrealistic system
//  test results. Zig() function and all function using it (Peak, Trough,
//  PeakBars, TroughBars) are intended for pattern recognition formulas only.
//
//  We will start wrting the formula for detecting double top pattern with
//  detecting peaks:
//
//  percdiff = 10; /* this defines percentage threshold for detecting peaks */
//
//  PK = Peak( H, percdiff, 1 ) == HIGH;
//
//  Now PK array will hold "1" for all bars when peaks occur and "0" elsewhere
//  because high price is equal to the peak value only on the day when this
//  peak occurs.
//
//  Now we want to know if two subsequent peaks are more or less the same:
//
//  peakdiff = ValueWhen( PK, H, 1 )/ValueWhen( PK, H, 2 );
//
//  The peakdiff variable holds now the high price of the most recent peak
//  divided by the high price of the second recent peak. Ideally this value
//  should be 1 - peaks are exactly the same but we will allow slight
//  differences. Let's say we allow the difference of one fourth of the
//  percentage threshold used for detecting peaks:
//
//  validdiff = percdiff/400;
//
//  doubletop = PK AND abs( peakdiff - 1 ) < validdiff;
//
//  Now doubletop variable is "1" if double peak occurred and the difference
//  between the peaks is less than one fourth of the threshold. In our example
//  the threshold in 10% and validdiff is 0.025 (2.5%).
//
//  Everything is fine but soon you find out that this formula is not too good.
//  It detects double tops much too often especially tops that are located to
//  close. For that reason we will add a check for distance between peaks:
//
//  percdiff = 10;
//
//  validdiff = percdiff/400;
//
//  mindistance = 10;
//
//  PK= Peak( H, percdiff, 1 ) == HIGH;
//
//  x = Cum( 1 );
//
//  XPK1 = ValueWhen( PK, x, 1 );
//
//  XPK2 = ValueWhen( PK, x, 2 );
//
//  peakdiff = ValueWhen( PK, H, 1 )/ValueWhen( PK, H, 2 );
//
//  doubletop = PK AND abs( peakdiff - 1 ) < validdiff AND (XPK1 - XPK2)>
//  mindistance;
//
//  The mindistance variable defines minimum number of bars between peaks
//  needed for valid double top formation. XPK1 and XPK2 variables hold the bar
//  number of the first and the second peak.
//
//  Now our formula does not detect peaks located to close but still generates
//  too much signals because it does not check for the validity of the second
//  peak. It just assumes too soon that the peak is valid. To be more sure we
//  need to wait for some days to find out that the second peak is important.
//  One idea is just to check for a couple of days if the price does not return
//  above the level of the peak. So our formula now will look like this:
//
//  percdiff = 10; /* peak detection threshold */
//
//  validdiff = percdiff/400;
//
//  fwdcheck = 4; /* how many days forward to check for valid second peak*/
//
//  mindistance = 10;
//
//  PK= Peak( H, percdiff, 1 ) == HIGH;
//
//  x = Cum( 1 );
//
//  XPK1 = ValueWhen( PK, x, 1 );
//
//  XPK2 = ValueWhen( PK, x, 2 );
//
//  peakdiff = ValueWhen( PK, H, 1 )/ValueWhen( PK, H, 2 );
//
//  doubletop = PK AND abs( peakdiff - 1 ) < validdiff
//
//  AND (XPK1 - XPK2) > mindistance
//
//  AND HIGH > HHV( Ref( H, fwdcheck ), fwdcheck - 1 );
//
//  Note that this formula now references the future ( look at the following
//  statement: Ref( H, fwdcheck ) ) - this means that it will not generate ANY
//  signals until fwdcheck bars pass after the second peak. So, for example, if
//  double top pattern has occured on Monday you will know about that on Friday
//  because four days (future quotes) are needed to confirm the pattern.
//
//  Now our formula for detecting double tops is much better, but still is
//  missing one imporant point - detecting prior trend. That is why it
//  sometimes generates false signals. I will not, however, go any further in
//  this article just to keep things simple. You can use the double top formula
//  in Automatic analysis/Scan function for screening the stocks for potential
//  reversal patterns or in Commentary. By adding buy=doubletop; sell=0;
//  statement to the formula you will be able to screen stocks for the
//  potential reversal patterns and see the arrows when the formula is used in
//  Commentary window.
//
//------------------------------------------------------------------------------

/* Detecting double tops */
percdiff = 5; /* peak detection threshold */
fwdcheck = 5; /* forward validity check */
mindistance = 10;
validdiff = percdiff/400;
PK= Peak( H, percdiff, 1 ) == High;

x = Cum( 1 );
XPK1 =  ValueWhen( PK, x, 1 ); 
XPK2 = ValueWhen( PK, x, 2 ); 

peakdiff = ValueWhen( PK, H, 1 )/ValueWhen( PK, H, 2 );
doubletop = PK AND abs( peakdiff - 1 ) < validdiff AND (XPK1 - XPK2)>mindistance
AND High > HHV( Ref( H, fwdcheck ), fwdcheck - 1 );
Buy = doubletop;
Sell = 0;

WriteIf( Highest( doubletop ) == 1, "AmiBroker has detected some possible double top patterns for " + Name() + "\nLook for green arrows on the price chart.", "There are no double top patterns for " + Name() );
_SECTION_END();
//_SECTION_BEGIN("foreign NMA");
//Vr=ParamList("Index",List = "^NSEI,^NSEBANK,RELIANCE.NS,SBIN.NS,EURUSD,XAUUSD",0); 
//SetForeign(Vr);
//HaC =(O+H+L+C)/4; 
//HaO = AMA( Ref( HaC, -1 ), 0.5 ); 
//HaH = Max( H, Max( HaC, HaO) ); 
//HaL = Min( L, Min( HaC, HaO) );
//BG3=HHV(LLV(HaL,4)+ATR(4),8); 
//BR3=LLV(HHV(HaH ,4)-ATR(4),8); 
//co = IIf(Hac>BG3 ,colorAqua,IIf(Hac < BR3,colorCustom12,colorGrey50)); 
//Plot(4, "", Co,styleArea+styleOwnScale | styleNoLabel, -1, 100);
//Comm2=("\n "+Vr+" Phase: ")+
//WriteIf(Hac>BG3,EncodeColor(colorLime)+"+Up",
//WriteIf(Hac<BR3,EncodeColor(colorRed)+"-Down",EncodeColor(colorLightYellow)+"< Flat >"));
//RestorePriceArrays();
//_SECTION_END();
//grid_day = IIf(Day()!=Ref(Day(),-1),1,0);  
//Plot(grid_day,"",colorDarkGrey,styleHistogram|styleDashed|styleNoLabel|styleOwnScale);
}