NMA v 3.6 a optimiser for Amibroker (AFL)

Plot( Close, "Price", 47, styleCandle );  
_SECTION_BEGIN(" NMA-TRADING");
k =  Optimize("mult",Param("mult",1.25,1,2,0.25),1,2,0.25); 
Per= Optimize("period",Param("period",10,5,50,1),5,50,1); 

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 ) );
ms=ParamList("ST0P/REV",List="Reg|Smoothed",0);
if(ms=="Reg")
{nm =(H-L);
j=(O+H+L+C)/4;
}
else
{nm=(HaHigh-HaLow);
j=(HaOpen+HaHigh+HaLow+HaClose)/4;
}

rfsctor = WMA(nm, 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];  
   } 
  } 
 } 
} 
Plot(NW, "", IIf(Trend == 1, 3, 3), 4);  
if(ms=="Reg")
{
Buy=Cover=Cross(j,nw);
Sell=Short=Cross(nw,j);
}
else
{
B = Cross(j,nw);
S = Cross(nw,j); 
Buysetup=Flip(b,s);
Shortsetup=Flip(s,b);
BuySetupValue		=	ValueWhen(b,H,1);
ShortsetupValue	=	ValueWhen(s,L,1);
b1= Buysetup AND Cross(C,BuySetupValue);
s1= Shortsetup AND Cross(ShortsetupValue,C);
Buy=b1;
Short=s1;
Sell=Shortsetup;
Cover=Buysetup;
}
Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
Short=ExRem(Short,Cover);
Cover=ExRem(Cover,Short);

PlotShapes(IIf(Buy, shapeUpTriangle, shapeNone),colorSkyblue, 0,Low,-25);  
PlotShapes(IIf(Sell, shapeHollowSmallDownTriangle, shapeNone),colorLightYellow, 0,High,-15);
PlotShapes(IIf(Cover, shapeHollowSmallUpTriangle, shapeNone),colorSkyblue, 0,Low,-15);  
PlotShapes(IIf(Short, shapeDownTriangle, shapeNone),colorLightYellow, 0,High,-25);


if( Status("action") == actionIndicator ) 
(
Title = EncodeColor(colorWhite)+ "NMA Optimiser 3.6 a ("+k+" - "+per+" - "+ms+")" + " - " +  Name() + " - " 
+ EncodeColor(colorRed)+ Interval(2) + EncodeColor(colorWhite)
+ Date()+"\n"+EncodeColor(colorYellow) +"Op-"+O+"  "+"Hi-"+H+"  "+"Lo-"+L+"  "+ 
"Cl-"+C+"  "+""+"Vol= "+ WriteVal(V)+"\n" );
_SECTION_BEGIN("Background text");
Font= ParamList("Font:","Arial|Calibri|Futura|Tahoma|MS Sans Serif|Times New Roman ",4);
C13=Param("fonts size",12,6,14,1 );
C14=Param("Text shift",100,50,150,5 );
Miny = Status("axisminy");
Maxy = Status("axismaxy");
lvb = Status("lastvisiblebar");
fvb = Status("firstvisiblebar");
pxwidth = Status("pxwidth");
pxheight = Status("pxheight");
GfxSetBkMode( 0 ); 
GfxSetOverlayMode(1);
GfxSetTextAlign( 6 );
GfxSelectFont(Font, C13, 700, False, False, 0); 
GfxSetTextColor(1);   
GfxTextOut(" NMA Optimiser v3.6  ", Status("pxwidth")/2 , Status("pxheight")/3 );
_SECTION_END();