Highly Accurate Nick MA Swing System - Amibroker AFL Code

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_SECTION_BEGIN("NICK MA Swing");
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(), colorBlack, 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================

Plot(NW, "", IIf(Trend == 1, 27, 4), 4);
Buy=Cover=Cross(j,nw);
Sell=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(colorLime)+
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=-40);
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorLime, 0,L, Offset=-50);                      
PlotShapes(IIf(Buy, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-45); 
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);
_SECTION_END();




//================================
_SECTION_BEGIN("Mean Band");
function SteBand( array, periods,number, upper ) 
{ 
Lr = LinearReg( array, periods ); 
se = StdErr( array, periods ); 
return LR + IIf( upper, 1, -1 ) * number * se; 
} 
Periods = Param("Standard Error", 80, 1, 200, 1); 
Smooth = Param("Mean Smoothness",14,2,100,1);
number = Param("StdErrNo", 1, 0.2, 3.0,0.2);

parmCloudColor = ParamColor("Cloud Color", ColorRGB( 40,40,40) );

UStdErrBand = SteBand( C, Periods, number, True ); 
LStdErrBand = SteBand( C, Periods, number, False ); 
MStdErrBand = (UStdErrBand + LStdErrBand )/2; 

Plot( MA(UStdErrBand,smooth), "UpperBand ", colorDarkRed,styleLine );
Plot( MA(LStdErrBand,smooth), "LowerBand ", colorDarkRed,styleLine ); 
Plot( MA(MStdErrBand,smooth) , "MidBand", colorPlum , styleDashed ); 

Plot( Close, "Close", colorBlack, styleCandle );
PlotOHLC( MA(UStdErrBand,smooth), MA(UStdErrBand,smooth), MA(LStdErrBand,smooth) , MA(LStdErrBand,smooth) , "", parmCloudColor, styleCloud | styleNoLabel); 

_SECTION_END();