-- Id: 16052
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=606

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function Init()
    indicator:name("Heikin-Ashi Smoothed");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
    indicator:setTag("group", "Trend");
    indicator:setTag("replaceSource", "t");
    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addString("Method1", "The smoothing method for prices", "The methods marked by the star (*) requires to have approriate indicators installed", "MVA");
    indicator.parameters:addStringAlternative("Method1", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("Method1", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("Method1", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("Method1", "SMMA*", "", "SMMA");
    indicator.parameters:addStringAlternative("Method1", "Vidya (1995)*", "", "VIDYA");
    indicator.parameters:addStringAlternative("Method1", "Vidya (1992)*", "", "VIDYA92");
    indicator.parameters:addStringAlternative("Method1", "Wilders*", "", "WMA");

    indicator.parameters:addInteger("N1", "Periods to smooth prices", "", 6, 1, 1000);

    indicator.parameters:addString("Method2", "The smoothing method for candles", "The methods marked by the star (*) requires to have approriate indicators installed", "MVA");
    indicator.parameters:addStringAlternative("Method2", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("Method2", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("Method2", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("Method2", "SMMA*", "", "SMMA");
    indicator.parameters:addStringAlternative("Method2", "Vidya (1995)*", "", "VIDYA");
    indicator.parameters:addStringAlternative("Method2", "Vidya (1992)*", "", "VIDYA92");
    indicator.parameters:addStringAlternative("Method2", "Wilders*", "", "WMA");

    indicator.parameters:addInteger("N2", "Periods to smooth candles", "", 6, 1, 1000);
	
	indicator.parameters:addGroup("Style");
	 indicator.parameters:addColor("UP", "Color of Up Candel", "", core.rgb(0, 255, 0));
	indicator.parameters:addColor("DOWN", "Color of Down Candle", "", core.rgb(255, 0, 0));
	
	    indicator.parameters:addGroup("Alert Parameters");  
	indicator.parameters:addString("Live", "End of Turn / Live", "", "Live");
    indicator.parameters:addStringAlternative("Live", "End of Turn", "", "End of Turn");
	indicator.parameters:addStringAlternative("Live", "Live", "", "Live");   

	indicator.parameters:addBoolean("Show", "Show Dialog box Alert", "", true);
	indicator.parameters:addBoolean("OnlyOnce", "Alert Once", "Subsequent Alert will be ignored.", false);	
	indicator.parameters:addBoolean("ShowAlert", "Show Alert", "", true);
	
	indicator.parameters:addGroup("Alert Style");
    indicator.parameters:addColor("UpTrendColor", "Up Trend Color", "", core.rgb(0, 0, 255));
	indicator.parameters:addColor("DownTrendColor", "Down Trend Color", "", core.rgb(0, 0, 255));
	indicator.parameters:addInteger("Size", "Label Size", "", 10, 1 , 100);
	
	indicator.parameters:addGroup("Alerts Sound");   
    indicator.parameters:addBoolean("PlaySound", "Play Sound", "", true);	
    indicator.parameters:addBoolean("RecurrentSound", "Recurrent Sound", "", false);

	
	indicator.parameters:addGroup("Alerts Email");   
	indicator.parameters:addBoolean("SendEmail", "Send Email", "", true);
    indicator.parameters:addString("Email", "Email", "", "");
    indicator.parameters:setFlag("Email", core.FLAG_EMAIL);

	
	Parameters (1, "Trend");	
	
end

function Parameters ( id, Label )
  
  
   indicator.parameters:addGroup(Label .. " Alert");
  
    indicator.parameters:addBoolean("ON"..id , "Show " .. Label .." Alert" , "", true);


    indicator.parameters:addFile("Up"..id, Label .. " Cross Over Sound", "", "");
    indicator.parameters:setFlag("Up"..id, core.FLAG_SOUND);
	
	indicator.parameters:addFile("Down"..id, Label .. " Cross Under Sound", "", "");
    indicator.parameters:setFlag("Down"..id, core.FLAG_SOUND);
	
	 indicator.parameters:addString("Label"..id, "Label", "", Label);

end 

local Number = 1;
local Up={};
local Down={};
local Label={};
local ON={};
local Size;
local Email;
local SendEmail;
local  RecurrentSound ,SoundFile  ;
local Show;
local Alert;
local PlaySound;
local Live;
local FIRST=true;
local OnlyOnce;
local U={};
local D={};
local UpTrendColor, DownTrendColor;
local OnlyOnceFlag;
local font;
local ShowAlert;
local Shift=0; 



local smopen = nil;
local smhigh = nil;
local smlow = nil;
local smclose = nil;

local iopen = nil;
local ihigh = nil;
local ilow = nil;
local iclose = nil;

local smiopen = nil;
local smihigh = nil;
local smilow = nil;
local smiclose = nil;

local open = nil;
local high = nil;
local low = nil;
local close = nil;

local first1 = 0;
local first2 = 0;

local UP, DOWN;

-- Routine
function Prepare(nameOnly)
    source = instance.source;
   
   
    OnlyOnceFlag=true;
	FIRST=true;
	OnlyOnce = instance.parameters.OnlyOnce;
	ShowAlert = instance.parameters.ShowAlert;
	Show = instance.parameters.Show;
	Live = instance.parameters.Live;
	UpTrendColor = instance.parameters.UpTrendColor;
	DownTrendColor = instance.parameters.DownTrendColor;
	Size=instance.parameters.Size;

    local name = "Heikin-Ashi Smoothed" .. "(" .. source:name() .. "," .. instance.parameters.Method1 .. "(" .. instance.parameters.N1 .. ")," .. instance.parameters.Method2 .. "(" .. instance.parameters.N2.. "))"
    instance:name(name);
    if nameOnly then
        return;
    end
	font = core.host:execute("createFont", "Wingdings", Size, false, false);
	
    -- was missing, so N1 was not set
    local N1 = instance.parameters.N1;	
	
	UP = instance.parameters.UP;
	DOWN = instance.parameters.DOWN;
   
    assert(core.indicators:findIndicator(instance.parameters.Method1) ~= nil, instance.parameters.Method1 .. " indicator must be installed");
    smopen = core.indicators:create(instance.parameters.Method1, source.open, N1);
    smclose = core.indicators:create(instance.parameters.Method1, source.close, N1);
    smhigh = core.indicators:create(instance.parameters.Method1, source.high, N1);
    smlow = core.indicators:create(instance.parameters.Method1, source.low, N1);

    first1 = smopen.DATA:first() + 1;

    iopen = instance:addInternalStream(first1, 0);
    iclose = instance:addInternalStream(first1, 0);
    ihigh = instance:addInternalStream(first1, 0);
    ilow = instance:addInternalStream(first1, 0);
   
    -- was missing, so N2 was not set
    local N2 = instance.parameters.N2;
   
    assert(core.indicators:findIndicator(instance.parameters.Method2) ~= nil, instance.parameters.Method2 .. " indicator must be installed");
    smiopen = core.indicators:create(instance.parameters.Method2, iopen, N2);
    smiclose = core.indicators:create(instance.parameters.Method2, iclose, N2);
    smihigh = core.indicators:create(instance.parameters.Method2, ihigh, N2);
    smilow = core.indicators:create(instance.parameters.Method2, ilow, N2);

    first2 = smiopen.DATA:first() + 1;
    open = instance:addStream("open", core.Line, name, "open", core.rgb(0, 0, 0), first2)
    high = instance:addStream("high", core.Line, name, "high", core.rgb(0, 0, 0), first2)
    low = instance:addStream("low", core.Line, name, "low", core.rgb(0, 0, 0), first2)
    close = instance:addStream("close", core.Line, name, "close", core.rgb(0, 0, 0), first2)
    instance:createCandleGroup("HAS", "HAS", open, high, low, close);
	
	Initialization();
end


function  Initialization ()
    
	 SendEmail = instance.parameters.SendEmail;
	 
	 local i;
	 for i = 1, Number , 1 do 
	  Label[i]=instance.parameters:getString("Label" .. i);
	  ON[i]=instance.parameters:getBoolean("ON" .. i);
	 end
	 
	 
	 

    if SendEmail then
        Email = instance.parameters.Email;
    else
        Email = nil;
    end
    assert(not(SendEmail) or (SendEmail and Email ~= ""), "E-mail address must be specified");
	
	
	 PlaySound = instance.parameters.PlaySound;
    if PlaySound then
    
	  for i = 1, Number , 1 do 
	  Up[i]=instance.parameters:getString("Up" .. i);
	  Down[i]=instance.parameters:getString("Down" .. i);
	  end
	
    else 
	
	  for i = 1, Number , 1 do 
       Up[i]=nil;
	  Down[i]=nil;
	  end
		
    end
    
        for i = 1, Number , 1 do 
	  assert(not(PlaySound) or (PlaySound and Up[i] ~= "") or (PlaySound and Up[i] ~= ""), "Sound file must be chosen"); 
	 assert(not(PlaySound) or (PlaySound and Down[i] ~= "") or (PlaySound and Down[i] ~= ""), "Sound file must be chosen");
	end
	 
    RecurrentSound = instance.parameters.RecurrentSound;
	
	for i = 1, Number , 1 do 
	U[i] = nil;
	D[i] = nil;	 
	end
		 
end	


-- Indicator calculation routine
function Update(period, mode)
    -- smooth source
    smopen:update(mode);
    smhigh:update(mode);
    smlow:update(mode);
    smclose:update(mode);

    if period >= first1 then
        -- calculate candles
        if (period == first1) then
            iopen[period] = (smopen.DATA[period - 1] + smclose.DATA[period - 1]) / 2;
        else
            iopen[period] = (iopen[period - 1] + iclose[period - 1]) / 2;
        end
        iclose[period] = (smopen.DATA[period] + smhigh.DATA[period] + smlow.DATA[period] + smclose.DATA[period]) / 4;
        ihigh[period] = math.max(iopen[period], iclose[period], smhigh.DATA[period]);
        ilow[period] = math.min(iopen[period], iclose[period], smlow.DATA[period]);

        -- smooth candles
        smiopen:update(mode);
        smihigh:update(mode);
        smilow:update(mode);
        smiclose:update(mode);
    end

    if period< first2 then
	return;
	end
	
        open[period] = smiopen.DATA[period];
        close[period] = smiclose.DATA[period];
        high[period] = math.max(open[period], close[period], smihigh.DATA[period]);
        low[period] = math.min(open[period], close[period], smilow.DATA[period]);
		
		
		if open[period] > close[period] then
		open:setColor(period, DOWN);	
		elseif open[period] < close[period] then
		open:setColor(period, UP);
		else
		open:setColor(period, core.rgb(128, 128, 128));
		end		
		
	if Live~= "Live" then
	period=period-1;
	Shift=1;
	else
	Shift=0;
	end
	
	core.host:execute ("removeLabel", source:serial(period)); 
    
	
    Activate (1, period);	
 
end


function ReleaseInstance()
       core.host:execute("deleteFont", font);
end	   

function Activate (id, period)

  
	  if id == 1  and ON[id]  then
	  
	       
			if  open[period] < close[period]
			and  open[period-1] >= close[period-1]
			then
			           
						    
             core.host:execute("drawLabel1", source:serial(period), source:date(period),  core.CR_CHART, low[period], core.CR_CHART, core.H_Center, core.V_Bottom, font, UpTrendColor, "\225");

 						 
						   
			
			 D[id] = nil;
						   
							  if U[id]~=source:serial(period) 
							  and period == source:size()-1-Shift
							  and not FIRST 
							  then
							  OnlyOnceFlag=false;
							  U[id]=source:serial(period);
							  SoundAlert(Up[id]);
							  EmailAlert(  Label[id], " Up ", period);
							  SendAlert(" Up ");  
							        
									Pop(Label[id], " Up " );  	
								    
								 
							  end
			elseif  open[period] > close[period]
			and  open[period-1] <= close[period-1]
            then			
			
			            			 
			               core.host:execute("drawLabel1", source:serial(period), source:date(period),  core.CR_CHART, high[period], core.CR_CHART, core.H_Center, core.V_Top, font, DownTrendColor, "\226");						   
						   
		     U[id] = nil;
		   
			                 if  D[id]~=source:serial(period)
							 and period == source:size()-1-Shift
							 and not FIRST 
							 then
							 OnlyOnceFlag=false;
							 D[id]=source:serial(period);
							 SoundAlert(Down[id]);			 
							 EmailAlert( Label[id] , " Down ", period);	
								 
									Pop(Label[id], " Down " );  	
								    SendAlert(" Down ");
							 
			                  end			   
	         end
			
	  
	 
	  end
	  
		   
        if FIRST then
        FIRST=false;      
        end		

end


function AsyncOperationFinished (cookie, success, message)
end


function Pop(label , note)
  
   if not Show then
   return;
   end
   
   core.host:execute ("prompt", 1, label ,   " ( " .. source:instrument() .. " : " .. source:barSize() .. " ) "  ..   label .. " : " .. note );
   
end


function SendAlert(message)
    if not ShowAlert then
        return;
    end
 
    terminal:alertMessage(source:instrument(), source[NOW], message, source:date(NOW));
end

function SoundAlert(Sound)
 if not PlaySound then
 return;
 end

  if OnlyOnce and OnlyOnceFlag== false then
 return;
 end
 
  terminal:alertSound(Sound, RecurrentSound);
end

 


function EmailAlert( label , Subject, period)

if not SendEmail then
return
end

 if OnlyOnce and OnlyOnceFlag== false then
 return;
 end

 
    local date = source:date(period);
	local DATA = core.dateToTable (date);
	
    
   local delim = "\013\010";  
   local Note=  profile:id().. delim.. " Label : " ..label  .. delim .. " Alert : " .. Subject ;   
   local Symbol= "Instrument : " .. source:instrument() ;
   local Time =  " Date : " .. DATA.month.." / ".. DATA.day .." Time:  ".. DATA.hour  .." / ".. DATA.min .." / ".. DATA.sec;  
   
 
    local TF= "Time Frame : " .. source:barSize();       
    local text = Note  .. delim ..  Symbol .. delim .. TF  .. delim .. Time;
	  
   terminal:alertEmail(Email, profile:id(), text);
end