William's Alligator System II for Amibroker (AFL)

/*
   Bill William's Alligator System II

   Reference Website:
   ==================
  
	http://www.alpari-idc.com/en/market-analysis-guide/chaos-theory/alligator-and-gator.html
   Modified from original formula by Steve Wiser - slwiserr@erols.com
   Modified by TohMz  on June 9th, 2008
*/
SetChartOptions( 0, chartShowArrows|chartShowDates );

_SECTION_BEGIN("Price Chart");
_N(Title = StrFormat("{{NAME}}- {{INTERVAL}} {{DATE}} O= %g, H= %g, L= %g, C= %g (%.1f%%) V= " +WriteVal( V, 1.0 ) +"\n{{VALUES}}", O, H, L, C, SelectedValue(ROC( C, 1 )) ));
PriceStyle = GetPriceStyle();
PriceStyleOpt = ParamStyle("Price Style")|PriceStyle;

if (PriceStyle==styleCandle)
   Plot( C, "", colorBlack,  PriceStyleOpt); 
else
   Plot( C, "", IIf( Close >= Ref(C, -1), colorBlue, colorRed ), PriceStyleOpt);
_SECTION_END();

_SECTION_BEGIN("BW Alligator");
/*** The trend indicators ***/

P= ParamList("Price", "Close|(H+L)/2|(H+C+L)/3",1);

if (P=="Close")
   A = C;
   
else
if (P=="(H+C+L)/3")
   A = (H+C+L)/3;
else
  A = (H+L)/2;

AlligatorJaw   = Ref(Wilders(A,13),-8);
AlligatorTeeth = Ref(Wilders(A,8), -5);
AlligatorLips  = Ref(Wilders(A,5), -3);

Plot(AlligatorJaw,  "Jaw", ParamColor("Jaw's Color",colorBlue),
ParamStyle("Jaw's Style", styleThick));
Plot(AlligatorTeeth,"Teeth", ParamColor("Teeth's Color",colorRed),
ParamStyle("Teeth's Style", styleThick));
Plot(AlligatorLips, "Lips", ParamColor("Lips's Color",colorGreen),
ParamStyle("Lips's Style", styleThick));

_SECTION_END();


_SECTION_BEGIN("BW Fractal");

UpFractal= ValueWhen(
  (Ref(H,-2) > Ref(H, -4)) AND
  (Ref(H,-2) > Ref(H, -3)) AND
  (Ref(H,-2) > Ref(H, -1)) AND
  (Ref(H,-2) > H), Ref(H,-2));

DownFractal= ValueWhen(
  (Ref(L,-2) <= Ref(L, -4)) AND
  (Ref(L,-2) <=  Ref(L, -3)) AND
  (Ref(L,-2) <=  Ref(L, -1)) AND
  (Ref(L,-2) <=  L), Ref(L,-2));



//== Added Crash  crashandburn59 [at] hotmail.com solution
Plot(Ref(UpFractal,2), "Up Fractal", ParamColor("Up Fractal Color",colorRed),ParamStyle("Up Fractal Style", styleDashed));
Plot(Ref(DownFractal,2), "Down Fractal",ParamColor("Down Fractal Color",colorBlue), ParamStyle("Down Fractal Style", styleDashed));

//Plot(Max(HHV(H,3),Ref(UpFractal,2)), "Up Fractal", ParamColor("Up Fractal Color",colorRed), ParamStyle("Up Fractal Style", styleDashed));
//Plot(Max(HHV(H,3),Ref(UpFractal,2)), "Down Fractal",ParamColor("Down Fractal Color",colorBlue), ParamStyle("Down Fractal Style", styleDashed));

_SECTION_END();



_SECTION_BEGIN("Exploration");

Inc = 0.1;  

//== Set the Price Range for stock to scan
PriceFrom = Param("Price From:", 5,   0.1, 200, Inc); 
PriceTo   = Param("Price To:",   100, 0.1, 200, Inc); 
MaxBreakOut = Param("Max Breakout (%)", 5, 1, 30);  
MaxBreakOut = MaxBreakOut/100;

Buy  = C>UpFractal AND C<=(1+MaxBreakOut)*UpFractal AND
AlligatorTeeth>AlligatorJaw;
Sell = C<DownFractal AND C>=(1-MaxBreakOut)*DownFractal AND
AlligatorTeeth<AlligatorJaw;

Filter = (Buy OR Sell) AND (C>=PriceFrom AND C<=PriceTo) AND V>0;
 
AddTextColumn(FullName(), "Security", 1.0, colorDefault, colorDefault, 200); 
AddTextColumn( WriteIf(Buy,"Buy", WriteIf(Sell, "Sell", "")), "Trade", 1.0);
AddColumn( UpFractal, "Up Fratal");
AddColumn( DownFractal, "Down Fratal");
//AddColumn( MA(V,3)/EMA(V,17), "MAV(3/17)");
AddColumn( C, "Today's Close");


_SECTION_END();