-- Id: 14451

-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=5003

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--|                               Copyright © 2018, Gehtsoft USA LLC | 
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |                    
--|                                          mario.jemic@gmail.com   |
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function Init()
    indicator:name("DMI ADX histogram oscillator");
    indicator:description("DMI ADX histogram oscillator");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("Period", "Period", "", 14);
    indicator.parameters:addBoolean("iADX", "Show ADX", "", true);
	indicator.parameters:addBoolean("iDMI", "Show DMI", "", true);
	indicator.parameters:addInteger("TriggerLevel", "TriggerLevel", "", 3);
    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("clrDMI_UP", "Color DMI UP", "Color DMI UP", core.rgb(0, 255, 0));
    indicator.parameters:addColor("clrDMI_DN", "Color DMI DN", "Color DMI DN", core.rgb(255, 0, 0));
    indicator.parameters:addColor("clrADX", "Color ADX", "Color ADX", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("widthLinReg", "ADX width", "ADX width", 1, 1, 5);
    indicator.parameters:addInteger("styleLinReg", "ADX style", "ADX style", core.LINE_SOLID);
    indicator.parameters:setFlag("styleLinReg", core.FLAG_LINE_STYLE);
	
	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("OnlyOnce", "Alert Once", "Subsequent Alert will be ignored.", false);	
	indicator.parameters:addBoolean("Show", "Show Dialog box Alert", "", true);
	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, "Zero Cross")
	Parameters (2, "Weakening 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 = 2;


local first;
local source = nil;
local Period;
local DMI;
local ADX;
local BuffDMI=nil;
local BuffADX=nil;
local iADX, iDMI;



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 Count;
local TriggerLevel;
function Prepare(nameOnly)

    OnlyOnceFlag=true;
	FIRST=true;
	OnlyOnce = instance.parameters.OnlyOnce;
	ShowAlert = instance.parameters.ShowAlert;
	TriggerLevel = instance.parameters.TriggerLevel;
	Show = instance.parameters.Show;
	Live = instance.parameters.Live;
	UpTrendColor = instance.parameters.UpTrendColor;
	DownTrendColor = instance.parameters.DownTrendColor;
	Size=instance.parameters.Size;
    font = core.host:execute("createFont", "Wingdings", Size, false, false);
	
    source = instance.source;
    Period=instance.parameters.Period;
	iADX=instance.parameters.iADX;
	iDMI=instance.parameters.iDMI;
    first = source:first()+Period;
    
    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.Period .. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end
	
	
	DMI = core.indicators:create("DMI", source, Period);
    ADX = core.indicators:create("ADX", source, Period);
	
	
	if iDMI then
    BuffDMI = instance:addStream("BuffDMI", core.Bar, name .. ".DMI", "DMI", instance.parameters.clrDMI_UP, first);
	else
	BuffDMI= instance:addInternalStream(0, 0);
	end
	
    if iADX then
	BuffADX = instance:addStream("BuffADX", core.Line, name .. ".ADX", "ADX", instance.parameters.clrADX, first);
    BuffADX:setWidth(instance.parameters.widthLinReg);
    BuffADX:setStyle(instance.parameters.styleLinReg);
	else
	BuffADX= instance:addInternalStream(0, 0);
	end
	
	BuffDMI:setPrecision(math.max(2, instance.source:getPrecision()));
	BuffADX:setPrecision(math.max(2, instance.source:getPrecision()));
	
	 Count= instance:addInternalStream(0, 0);
 
	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	

function Update(period, mode)
   if (period<first ) then
   return;
   end
   
    DMI:update(mode);
    ADX:update(mode);
    BuffADX[period]=ADX.DATA[period];
    BuffDMI[period]=DMI.DIP[period]-DMI.DIM[period];
    if BuffDMI[period]>0 then
     BuffDMI:setColor(period,instance.parameters.clrDMI_UP);
    else
     BuffDMI:setColor(period,instance.parameters.clrDMI_DN);
    end
   
   if BuffDMI[period] >0 and BuffDMI[period-1] <= 0 then
   Count[period]=1;
   elseif BuffDMI[period]<0 and BuffDMI[period-1] >= 0 then
   Count[period]=-1;
   else
	   if   BuffDMI[period] >  BuffDMI[period-1] then
		   if BuffDMI[period-1]>=0 then 
		   Count[period]= Count[period-1]+1;
		   else
		   Count[period]=-1;
		   end
	   elseif   BuffDMI[period] <  BuffDMI[period-1] then
	       if BuffDMI[period-1]<=0 then 
		   Count[period]= Count[period-1]-1;
		   else
		   Count[period]=1;
		   end
	    
	   end
    end
    core.host:execute ("removeLabel", source:serial(period)); 
 
    Activate (1, period);
	Activate (2, period);
end


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

function Activate (id, period)

   local Shift=0;
   

   if Live~= "Live" then
	period=period-1;
	Shift=1;
	end
 
	  if id == 1  and ON[id]  then
	  
	       
			if  BuffDMI[period] > 0
			and   BuffDMI[period-1] <= 0
			then
			           
						    
             core.host:execute("drawLabel1", source:serial(period), source:date(period),  core.CR_CHART, 0, 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], " Cross Over", period);
							  SendAlert("Crossed over");  
							        
									Pop(Label[id], " Cross Over " );  	
								    
								 
							  end
			elseif  BuffDMI[period] < 0
			and   BuffDMI[period-1] >= 0
            then			
			
			            			 
			               core.host:execute("drawLabel1", source:serial(period), source:date(period),  core.CR_CHART,0, 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] , " Cross Under", period);	
								 
									Pop(Label[id], " Cross Under " );  	
								    SendAlert("Crossed under");
							 
			                  end			   
	         end
			
	  
	 
	  end
	  
	  --[[
	   after the FIRST SMALLER BAR created following 3 or more consecutive EQUAL or
        HIGHER BARS in either BUY or SELL direction. 
	  
	  ]]
	  
	  
	   if id == 2  and ON[id]  then
	  
	       
			if   Count[period-1] >= TriggerLevel 
            and  Count[period] < Count[period-1] 		
			then
			           
						    
             core.host:execute("drawLabel1", source:serial(period), source:date(period),  core.CR_CHART,  BuffDMI[period], core.CR_CHART, core.H_Center, core.V_Top, font, DownTrendColor, "\226");

 						 
						   
			
			 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], " Cross Over", period);
							  SendAlert("Crossed over");  
							        
									Pop(Label[id], " Cross Over " );  	
								    
								 
							  end
			elseif  Count[period-1] <= - TriggerLevel 
			and  Count[period] > Count[period-1]
            then			
			
			            			 
			               core.host:execute("drawLabel1", source:serial(period), source:date(period),  core.CR_CHART,  BuffDMI[period], core.CR_CHART, core.H_Center, core.V_Bottom, font, UpTrendColor, "\225");						   
						   
		     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] , " Cross Under", period);	
								 
									Pop(Label[id], " Cross Under " );  	
								    SendAlert("Crossed under");
							 
			                  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