-- More information about this indicator can be found at:
-- http://fxcodebase.com/
-- Id: 18225

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
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--+------------------------------------------------------------------+

function Init()
    indicator:name("Two Source Ratio BB with Alert");
    indicator:description(" ");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
	
	
	indicator.parameters:addGroup("Calculation");
	indicator.parameters:addBoolean("Inverse", "Inverse", "", false);
	
	
	
	 
	indicator.parameters:addString("TF", "Time frame", "", "Chart");
    indicator.parameters:addStringAlternative("TF", "Chart", "", "Chart");
	indicator.parameters:addStringAlternative("TF", "m1", "", "m1");
	indicator.parameters:addStringAlternative("TF", "m5", "", "m5");
	indicator.parameters:addStringAlternative("TF", "m15", "", "m15");
	indicator.parameters:addStringAlternative("TF", "m30", "", "m30");
	indicator.parameters:addStringAlternative("TF", "H1", "", "H1");
	indicator.parameters:addStringAlternative("TF", "H2", "", "H2");
	indicator.parameters:addStringAlternative("TF", "H3", "", "H3");
	indicator.parameters:addStringAlternative("TF", "H4", "", "H4");
	indicator.parameters:addStringAlternative("TF", "H6", "", "H6");
	indicator.parameters:addStringAlternative("TF", "H8", "", "H8");
	indicator.parameters:addStringAlternative("TF", "D1", "", "D1");
	indicator.parameters:addStringAlternative("TF", "W1", "", "W1");
	indicator.parameters:addStringAlternative("TF", "M1", "", "M1");
   
   
    indicator.parameters:addGroup("1. Source");
   
    indicator.parameters:addString("Src", "1. Source Price", "", "close");
    indicator.parameters:addStringAlternative("Src", "open", "", "open");
    indicator.parameters:addStringAlternative("Src", "high", "", "high");
    indicator.parameters:addStringAlternative("Src", "low", "", "low");
    indicator.parameters:addStringAlternative("Src", "close", "", "close");
    indicator.parameters:addStringAlternative("Src", "median", "", "median");
    indicator.parameters:addStringAlternative("Src", "typical", "", "typical");
    indicator.parameters:addStringAlternative("Src", "weighted", "", "weighted"); 
	
    indicator.parameters:addString("Pair1", "1. instrument", "", "EUR/USD");
    indicator.parameters:setFlag("Pair1", core.FLAG_INSTRUMENTS);
	
	
	indicator.parameters:addGroup("2. Source");
	
	indicator.parameters:addString("Dst", "2. Source Price", "", "close");
    indicator.parameters:addStringAlternative("Dst", "open", "", "open");
    indicator.parameters:addStringAlternative("Dst", "high", "", "high");
    indicator.parameters:addStringAlternative("Dst", "low", "", "low");
    indicator.parameters:addStringAlternative("Dst", "close", "", "close");
    indicator.parameters:addStringAlternative("Dst", "median", "", "median");
    indicator.parameters:addStringAlternative("Dst", "typical", "", "typical");
    indicator.parameters:addStringAlternative("Dst", "weighted", "", "weighted");
	
	
	indicator.parameters:addString("Pair2", "2. instrument", "", "EUR/JPY");
    indicator.parameters:setFlag("Pair2", core.FLAG_INSTRUMENTS);
	
	
    indicator.parameters:addGroup("BB Calculation"); 
    indicator.parameters:addInteger("BB_Period", "Period", "", 20);
	indicator.parameters:addDouble("BB_Deviaton", "BB Deviaton", "", 2);
    
	indicator.parameters:addGroup("Ratio Style");
	indicator.parameters:addColor("clr", "Line Color", "", core.rgb(0, 255, 255));
    indicator.parameters:addInteger("width", "Line Width (in pixels)", "", 1, 1, 5);
    indicator.parameters:addInteger("style", "Line Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LEVEL_STYLE);
	
	indicator.parameters:addGroup("BB Style");
	indicator.parameters:addColor("clr1", "Line Color", "", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("width1", "Line Width (in pixels)", "", 1, 1, 5);
    indicator.parameters:addInteger("style1", "Line Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style1", core.FLAG_LEVEL_STYLE);
   
   
    indicator.parameters:addGroup("Alert Parameters");  
	indicator.parameters:addString("Live", "Execution", "", "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", "", false);	
    indicator.parameters:addBoolean("RecurrentSound", "Recurrent Sound", "", false);

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

	
	Parameters (1, "Top Line");	
    Parameters (2, "Bottom Line");	
	Parameters (3, "Central Line");	
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 Src, Dst;
local source;   
local loading={};
local Pair={};
local Source={};
local Inverse;
local Ratio;
local Number=2;
local dayoffset, weekoffset;
local TF;
local BB_Period, BB_Deviaton,BB,TL,BL,CL;



local TheNumber = 3;
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 Alert={}; 
local AlertLevel={};


function Prepare(onlyName)
    source = instance.source;   
    price_first = source:first();
	
	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;
	
	dayoffset = core.host:execute("getTradingDayOffset");
    weekoffset = core.host:execute("getTradingWeekOffset");	
 
    Inverse = instance.parameters.Inverse;
	TF= instance.parameters.TF;
    Pair[1] = instance.parameters.Pair1;
	Pair[2] = instance.parameters.Pair2;
	
	Src = instance.parameters.Src;
	Dst = instance.parameters.Dst;
	
	if TF == "Chart" then
	TF=source:barSize();
	end

    local name;
    name = profile:id() .. "(" .. source:name()   .. ")";
    instance:name(name);
	
    if onlyName then
        return ;
    end

   
    for i= 1, Number, 1 do
            Source[i] = core.host:execute("getSyncHistory",Pair[i], TF, source:isBid(), 0, 200+i, 100+i);
			loading[i]=true;	  
    end
    Ratio = instance:addStream("Ratio", core.Line, name, "Ratio", instance.parameters.clr, source:first());
    Ratio:setWidth(instance.parameters.width);
    Ratio:setStyle(instance.parameters.style);
    Ratio:setPrecision(2);
	
	BB = core.indicators:create("BB", Ratio, BB_Period,BB_Deviaton);
	
	
	
	TL = instance:addStream("TL", core.Line, name, "TL", instance.parameters.clr1, source:first());
    TL:setPrecision(math.max(2, instance.source:getPrecision()));
    TL:setWidth(instance.parameters.width1);
    TL:setStyle(instance.parameters.style1);
	
	BL = instance:addStream("BL", core.Line, name, "BL", instance.parameters.clr1, source:first());
    BL:setPrecision(math.max(2, instance.source:getPrecision()));
    BL:setWidth(instance.parameters.width1);
    BL:setStyle(instance.parameters.style1);
    
	CL = instance:addStream("CL", core.Line, name, "CL", instance.parameters.clr1, source:first());
    CL:setPrecision(math.max(2, instance.source:getPrecision()));
    CL:setWidth(instance.parameters.width1);
    CL:setStyle(instance.parameters.style1);
	
	
     for i= 1, TheNumber , 1 do
		Alert[i]=instance:addInternalStream(0, 0);
		AlertLevel[i]=instance:addInternalStream(0, 0);
     end
	
	AlertInitialization();	
	instance:ownerDrawn(true);	 
   
end


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



local init = false;
 
function Draw(stage, context)
 
	 if stage~= 2 then
	  return;
	  end
	  
	  
	
        if not init then
           context:createFont (1, "Wingdings", context:pointsToPixels (Size), context:pointsToPixels (Size), 0);
            init = true;
        end
		
		

		
		for period= math.max(context:firstBar (),source:first()), math.min( context:lastBar (), source:size()-1), 1 do
		
		 
		
		 x, x1, x2= context:positionOfBar (period);
		 
		 for Level = 1 , TheNumber ,  1 do
		   if Alert[Level]:hasData(period) then
		     
		    if Alert[Level][period]== 1 then
			visible, y = context:pointOfPrice (AlertLevel[Level][period]);
			
			  width, height = context:measureText (1,  "\225", 0);
              context:drawText (1,   "\225", UpTrendColor, -1,  x-width/2 ,  y-height , x+width/2 , y, 0 );	
   
			elseif Alert[Level][period]== -1 then
			visible, y = context:pointOfPrice (AlertLevel[Level][period]);
			width, height = context:measureText (1,  "\226", 0);
			 context:drawText (1,   "\226", DownTrendColor, -1,  x-width/2  ,  y , x+width/2 ,y+height, 0 );	
		    end
		  end
		    
		 
		end
		end
		
  
end		

function Update(period,mode )
   
   
    if period < source:first() then
	return;
	end
	
    local p={};
	local Flag = false;	
 
	 
    for j = 1, Number, 1 do
		 
		p[j]= Initialization(period,j)
			  
		if loading[j] or p[j] == false or  p[j] <=0  then
		Flag=true;
		end	 

		  
		
	end    
	
	    if Flag then
		return;
		end
		
 

  
        if not Inverse	then
	 	Ratio[period] = Source[1][Src][p[1]]/Source[2][Dst][p[2]] ; 
		else
         Ratio[period] = Source[2][Dst][p[2]]/Source[1][Src][p[1]];      
        end		
		
		
		BB:update(mode);
		
		if period < BB.DATA:size()-1 then
		return;
		end
		
		
		TL[period]=BB.TL[period];
		BL[period]=BB.BL[period];
		CL[period]=BB.AL[period];
		
		
		
    if Live~= "Live" then
	period=period-1;
	Shift=1;
	else
	Shift=0;
	end
	
	 
    Activate (1, period);
    Activate (2, period);
	Activate (3, period);
end

	
	
	
function   Initialization(period,id)

    local Candle;
    Candle = core.getcandle(source:barSize(), source:date(period), dayoffset, weekoffset);
  
    if loading[id] or Source[id]:size() == 0  then
        return false;
    end

    
    if period < source:first() then
        return false;
    end

    local P = core.findDate(Source[id], Candle, false);
	 

    -- candle is not found
    if P < 0    then
        return false;
	else return P;	
    end
			
end	




-- the function is called when the async operation is finished
function AsyncOperationFinished(cookie)
     local j;	 
	local Flag = true;	
	local Count=0;	
	
	
	    local id=0;
		
    for j = 1, Number, 1 do
		id=id+1;
			  if cookie == (100+id) then
			  loading[j] = true;
		      elseif  cookie == (200+id) then
			  loading[j] = false;			  		 
              end
			  
		if loading[j] then
		Count=Count+1;
		Flag=false;
		end	 

		  
		
	end    
	
	    if Flag then
		core.host:execute ("setStatus", " ");
		instance:updateFrom(0);
		else
		core.host:execute ("setStatus", " Loading ".. (Number-Count) .."/" .. Number);
		end
			     
        
		return core.ASYNC_REDRAW ;
end




function Activate (id, period)


   Alert[id][period]=0;
   
   
  
  
	  if id == 1  and ON[id]  then
	  
	       
			if  Ratio[period] > TL[period] 
			and   Ratio[period-1] <= TL[period-1] 
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= TL[period] 
						   
			
			 D[id] = nil;
						   
							  if U[id]~=source:serial(period) 
							  and period == source:size()-1-Shift
							  and not FIRST 
							  and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							  then
							  
							  U[id]=source:serial(period);
							  SoundAlert(Up[id]);
							  EmailAlert(  Label[id], " Cross Over ", period);
							  SendAlert( Label[id]," Crossed over ", period); 
							  Pop(Label[id], " Cross Over ", period );  
							  OnlyOnceFlag=false;
							  end
							  
			elseif  Ratio[period] < TL[period] 
			and   Ratio[period-1] >= TL[period-1] 
            then			
			
			            			 
			                Alert[id][period]= -1;	
							AlertLevel[id][period]= TL[period] 
						   
		     U[id] = nil;
		   
			                 if  D[id]~=source:serial(period)
							 and period == source:size()-1-Shift
							 and not FIRST 
							 and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							 then							
							 D[id]=source:serial(period);
							 SoundAlert(Down[id]);			 
							 EmailAlert( Label[id] , " Cross Under ", period);								 
							 Pop(Label[id], " Cross Under ", period );  	
							 SendAlert( Label[id]," Crossed under ", period);
							 OnlyOnceFlag=false;
			                 end			   
	         end
			
	  
	 
	  end
	  
	  
	  	  if id == 2  and ON[id]  then
	  
	       
			if  Ratio[period] > BL[period] 
			and   Ratio[period-1] <= BL[period-1] 
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= BL[period] 
						   
			
			 D[id] = nil;
						   
							  if U[id]~=source:serial(period) 
							  and period == source:size()-1-Shift
							  and not FIRST 
							  and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							  then
							  
							  U[id]=source:serial(period);
							  SoundAlert(Up[id]);
							  EmailAlert(  Label[id], " Cross Over ", period);
							  SendAlert( Label[id]," Crossed over ", period); 
							  Pop(Label[id], " Cross Over ", period );  
							  OnlyOnceFlag=false;
							  end
							  
			elseif  Ratio[period] < BL[period] 
			and   Ratio[period-1] >= BL[period-1] 
            then			
			
			            			 
			                Alert[id][period]= -1;	
							AlertLevel[id][period]= BL[period] 
						   
		     U[id] = nil;
		   
			                 if  D[id]~=source:serial(period)
							 and period == source:size()-1-Shift
							 and not FIRST 
							 and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							 then							
							 D[id]=source:serial(period);
							 SoundAlert(Down[id]);			 
							 EmailAlert( Label[id] , " Cross Under ", period);								 
							 Pop(Label[id], " Cross Under ", period );  	
							 SendAlert( Label[id]," Crossed under ", period);
							 OnlyOnceFlag=false;
			                 end			   
	         end
			
	  
	 
	  end
	
     	  if id == 3  and ON[id]  then
	  
	       
			if  Ratio[period] > CL[period] 
			and   Ratio[period-1] <= CL[period-1] 
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= CL[period] 
						   
			
			 D[id] = nil;
						   
							  if U[id]~=source:serial(period) 
							  and period == source:size()-1-Shift
							  and not FIRST 
							  and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							  then
							  
							  U[id]=source:serial(period);
							  SoundAlert(Up[id]);
							  EmailAlert(  Label[id], " Cross Over ", period);
							  SendAlert( Label[id]," Crossed over ", period); 
							  Pop(Label[id], " Cross Over ", period );  
							  OnlyOnceFlag=false;
							  end
							  
			elseif  Ratio[period] < CL[period] 
			and   Ratio[period-1] >= CL[period-1] 
            then			
			
			            			 
			                Alert[id][period]= -1;	
							AlertLevel[id][period]= CL[period] 
						   
		     U[id] = nil;
		   
			                 if  D[id]~=source:serial(period)
							 and period == source:size()-1-Shift
							 and not FIRST 
							 and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							 then							
							 D[id]=source:serial(period);
							 SoundAlert(Down[id]);			 
							 EmailAlert( Label[id] , " Cross Under ", period);								 
							 Pop(Label[id], " Cross Under ", period );  	
							 SendAlert( Label[id]," Crossed under ", period);
							 OnlyOnceFlag=false;
			                 end			   
	         end
			
	  
	 
	  end
	
        if FIRST then
        FIRST=false;      
        end		

end



 

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

  terminal:alertSound(Sound, RecurrentSound);
end

 


function EmailAlert( label , Subject, period)

if not SendEmail 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
	 
	 
	 
	 

function Pop(label , Subject, period)
  
   if not Show 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;
	
   
   core.host:execute ("prompt", 1, label , text );


end


function SendAlert(label ,Subject, period)
    if not ShowAlert 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:alertMessage(source:instrument(), source[NOW], text, source:date(NOW));
end