-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=65133

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--//////////////////////////////////////////////////////////////////////////////
--\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

local Number = 4;
local Symbols={"\225","\226", "\225","\226",};
local Font={"Wingdings", "Wingdings", "Wingdings", "Wingdings"};
local Alert_Name={ "Divergence" ,"Divergence", "Divergence", "Divergence"};
local Signal_Name={"Classic bullish", "Classic bearish", "Reversal bullish", "Reversal bearish"};
--//////////////////////////////////////////////////////////////////////////////
--\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\



function Init()
    indicator:name("Stochastic %K Divergence");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

    indicator.parameters:addInteger("K", "K", "Parameter of stochastic", 5);
    indicator.parameters:addInteger("SD", "SD", "Parameter of stochastic", 3);
    indicator.parameters:addColor("D_color", "Color of Divergence line", "", core.rgb(0, 155, 255));
    indicator.parameters:addColor("UP_color", "Color of Uptrend", "", core.rgb(255, 0, 0));
    indicator.parameters:addColor("DN_color", "Color of Downtend", "", core.rgb(0, 255, 0));
--\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
 
    indicator.parameters:addGroup("Alert Parameters");  
	indicator.parameters:addString("Signal_Execution", "Signal Execution", "", "Live");
    indicator.parameters:addStringAlternative("Signal_Execution", "End of Turn", "", "End of Turn");
	indicator.parameters:addStringAlternative("Signal_Execution", "Live", "", "Live");  
	
 
	indicator.parameters:addString("Alert_Execution", "Alert Execution", "", "Live");
    indicator.parameters:addStringAlternative("Alert_Execution", "End of Turn", "", "End of Turn");
	indicator.parameters:addStringAlternative("Alert_Execution", "Live", "", "Live");  

   
   	indicator.parameters:addString("Alert_Triger", "Alert Triger", "", "Both");
    indicator.parameters:addStringAlternative("Alert_Triger", "Timer", "", "Timer");
	indicator.parameters:addStringAlternative("Alert_Triger", "Price", "", "Price");
    indicator.parameters:addStringAlternative("Alert_Triger", "Both", "", "Both");
	
    indicator.parameters:addInteger("Timer", "Execution Timer (in seconds)", "", 1, 0, 1000);
 
   
    
 
	 
	indicator.parameters:addInteger("ToTime", "Convert the date to", "", 6);
    indicator.parameters:addIntegerAlternative("ToTime", "EST", "", 1);
    indicator.parameters:addIntegerAlternative("ToTime", "UTC", "", 2);
    indicator.parameters:addIntegerAlternative("ToTime", "Local", "", 3);
    indicator.parameters:addIntegerAlternative("ToTime", "Server", "", 4);
    indicator.parameters:addIntegerAlternative("ToTime", "Financial", "", 5);
	indicator.parameters:addIntegerAlternative("ToTime", "Display", "", 6);	

	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:addBoolean("Show_Unconfirmed", "Show Unconfirmed Signals", "", false);
 
  
	
	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", "", false);
    indicator.parameters:addString("Email", "Email", "", "");
    indicator.parameters:setFlag("Email", core.FLAG_EMAIL);

	
	local Color={};
	Color[1]= core.rgb(0, 255, 0);
	Color[2]= core.rgb(255, 0, 0);
	Color[3]= core.rgb(0, 255, 0);
	Color[4]= core.rgb(255, 0, 0);	
	
	for i= 1, Number, 1 do
	Parameters (i, Alert_Name[i], Signal_Name[i],Color[i]);	
 
 	end
 
	 
end




function Parameters ( id, Label1,Label2,internal_color )
  
  
   indicator.parameters:addGroup(id .. ". " ..Label1 .. " Alert");
  
    indicator.parameters:addBoolean("Alert_ON"..id , "Show " .. Label2 .." Alert" , "", true);
    indicator.parameters:addBoolean("Signal_ON"..id , "Show " .. Label2 .." Signal" , "", true); 
	

    indicator.parameters:addFile("Sound"..id, Label2 .. " Sound", "", "");
    indicator.parameters:setFlag("Sound"..id, core.FLAG_SOUND);

    indicator.parameters:addString("Alert_Label1"..id, "Alert Label", "", Label1);
	 indicator.parameters:addString("Alert_Label2"..id, "Alert Signal", "", Label2);
	 
	 
	 indicator.parameters:addColor("Color"..id, "Label Color", "",internal_color); 
	indicator.parameters:addInteger("Size"..id, "Label Size", "", 10, 1 , 100);

end 



local Sound={};
local Label1={};
local Label2={};
local Signal_ON={}; 
local Alert_ON={}; 
local Email;
local SendEmail;
local  RecurrentSound ,SoundFile  ;
local Show;
 
local PlaySound;
--local Live;
--local FIRST=true;
local OnlyOnce;
local ItIs={};
local Color={};
local Size={};
local OnlyOnceFlag;
local ShowAlert;
local Alert={}; 
local AlertLevel={};
local ToTime;
local Shift=0; 
local Timer;
--local Show_Unconfirmed;
local Signal_Execution, Alert_Execution,Alert_Triger;
local Alignment={};
--^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


local DD;
local UP_color;
local DN_color;

local first;
local source = nil;

local D = nil;
local UP = nil;
local DN = nil;
local Stochastic = nil;
local lineid = nil;

function Prepare(nameOnly)
    DD = instance.parameters.DD;
    UP_color = instance.parameters.UP_color;
    DN_color = instance.parameters.DN_color;
    source = instance.source;
    Stochastic = core.indicators:create("STOCHASTIC", source, instance.parameters.K,instance.parameters.SD,3);
    first = Stochastic.DATA:first();

    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.K .. ", " .. instance.parameters.SD .. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end


    Signal = instance:addInternalStream(0, 0);	
	
    D = instance:addStream("Stochastic", core.Line, name .. ".Stochastic", "Stochastic", instance.parameters.D_color, first, -1);
    D:addLevel(20);
    D:addLevel(80);
    UP = instance:createTextOutput ("Up", "Up", "Wingdings", 10, core.H_Center, core.V_Top, instance.parameters.UP_color, -1);
    DN = instance:createTextOutput ("Dn", "Dn", "Wingdings", 10, core.H_Center, core.V_Bottom, instance.parameters.DN_color, -1);
	
	D:setPrecision(math.max(2, instance.source:getPrecision()));
--\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

   
   	Alert_Triger= instance.parameters.Alert_Triger;
	
	 
 
    if Alert_Triger ~= "Timer" then
    core.host:execute("subscribeTradeEvents", 10, "offers");
    end
	

	
	Timer= instance.parameters.Timer 
	Initialization();	
	instance:ownerDrawn(true);	
	
	if Alert_Triger ~= "Price" then-- this will work for Timer and Both
    core.host:execute ("setTimer", 9 , Timer);
	end
			
end 

function ReleaseInstance()
core.host:execute ("killTimer", 9 );
end 
 
 
--^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 


local pperiod = nil;
local pperiod1 = nil;
local line_id = 0;

function Update(period, mode)
    if pperiod ~= nil and pperiod > period then
        core.host:execute("removeAll");
    end
	
	
	--Signal[period]=1;
	
    pperiod = period;
    if  pperiod1 ~= source:serial(period) then
        
		   
			pperiod1 = source:serial(period)
			period = period - 1;

			Stochastic:update(mode);
			if period >= first then
				D[period] = Stochastic.K[period];
				if period >= first + 2 then
					processBullish(period - 2);
					processBearish(period - 2);
				end
			end

    end
--\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
	
	if Signal_Execution~= "Live" then-- if Signal_Execution is NOT a Live shift period by 1 
	period =period - 2-1;	 
    else
	period =period - 2;	 
	end
	
    if period   <= 4 then
	return;
	end
	
    for id=1, Number, 1 do
    Signal_Logic (id, period);
	end
end




 

function  Initialization ()


    ToTime=instance.parameters.ToTime;
	
	if ToTime == 1 then
	ToTime=core.TZ_EST;
	elseif ToTime == 2 then
	ToTime=core.TZ_UTC;
	elseif ToTime == 3 then
	ToTime=core.TZ_LOCAL;
	elseif ToTime == 4 then
	ToTime=core.TZ_SERVER;
	elseif ToTime == 5 then
	ToTime=core.TZ_FINANCIAL;
	elseif ToTime == 6 then
	ToTime=core.TZ_TS;
	end
	
    
	OnlyOnceFlag=true;
	
	Signal_Execution = instance.parameters.Signal_Execution;
	Alert_Execution = instance.parameters.Alert_Execution;

	 
	OnlyOnce = instance.parameters.OnlyOnce;
	ShowAlert = instance.parameters.ShowAlert;
	Show = instance.parameters.Show;
	--Live = instance.parameters.Live;
	Show_Unconfirmed= instance.parameters.Show_Unconfirmed;

     for i= 1, Number , 1 do
		Alert[i]=instance:addInternalStream(0, 0);
		AlertLevel[i]=instance:addInternalStream(0, 0);
		Alignment[i]= instance:addInternalStream(0, 0);
     end
	 
	 
    
	 SendEmail = instance.parameters.SendEmail;
	 
	 local i;
	 for i = 1, Number , 1 do 
	  Label1[i]=instance.parameters:getString("Alert_Label1" .. i);
	  Label2[i]=instance.parameters:getString("Alert_Label2" .. i);
	  Signal_ON[i]=instance.parameters:getBoolean("Signal_ON" .. i);
	  Alert_ON[i]=instance.parameters:getBoolean("Alert_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");
	
	
	for i = 1, Number , 1 do 
	  Color[i]=instance.parameters:getColor("Color" .. i);
	  Size[i]=instance.parameters:getInteger("Size" .. i);
	end  
	
	 PlaySound = instance.parameters.PlaySound;
    if PlaySound then
    
	  for i = 1, Number , 1 do 
	  Sound[i]=instance.parameters:getString("Sound" .. i);
	 
	  end
	
    else 
	
	  for i = 1, Number , 1 do 
       Sound[i]=nil; 
	  end
		
    end
    
        for i = 1, Number , 1 do 
	  	 assert( not(PlaySound  and (Sound[i] == "" or Sound[i] == nil ) ), "Sound file must be chosen");
    
	end
	 
    RecurrentSound = instance.parameters.RecurrentSound;
	
	for i = 1, Number , 1 do 
	ItIs[i] = nil; 
	end
		 
end	

 


function Signal_Logic (id, period)


       
	  --  if not Show_Unconfirmed then
	   -- Alert[id][period]= 0;	
		--end
  
	
	    --id 1 will define Cross Over Alert
	    if id== 1  then   
			if  Signal[period] == 1  
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= 20;
				Alignment[id][period]= -1;		   
					
						   							  
			elseif  Signal[period] ~= 1 
 
            then			
			--We will reset CrossOver Alert 
						   
		  
		     Alert[id][period]= 0;
			                
	         end
			
	    end
		
	    --id 2 will define Cross Under Alert		
	    if id== 2  then   
			if  Signal[period] == 2  
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= 80;
				Alignment[id][period]= 1;		   
					
						   							  
			elseif  Signal[period] ~= 2 
 
            then			
			--We will reset CrossOver Alert 
						   
		  
		     Alert[id][period]= 0;
			                
	         end
			
	    end



 
	    if id== 3  then   
			if  Signal[period] == 3  
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= 20;
				Alignment[id][period]= -1;		   
					
						   							  
			elseif Signal[period] ~= 3 
 
            then			
			--We will reset CrossOver Alert 
						   
		  
		     Alert[id][period]= 0;
			                
	         end
			
	    end
		
	    --id 2 will define Cross Under Alert		
	    if id== 4  then   
			if  Signal[period] == 4  
			then
			           
						    
         
                Alert[id][period]= 1;	
 				AlertLevel[id][period]= 80;
				Alignment[id][period]= 1;		   
					
						   							  
			elseif    Signal[period] ~= 4  
            then			
			--We will reset CrossOver Alert 
						   
		  
		     Alert[id][period]= 0;
			                
	         end
			
	    end
end
 





function AsyncOperationFinished (cookie, success, message)

    if cookie~=10--subscribeTradeEvents
	and cookie~= 9 --Timer
	then
	return;
	end
	
 
	
    local Last_Period=source:size()-1;
	
	
	if Signal_Execution~= "Live" then
	Last_Period=Last_Period-1;		
	end
	
    if Alert_Execution~= "Live" then
	Last_Period=Last_Period-1;	 
	end
	
	
     if Last_Period < first 
	 then
	 return;
	 end
	
	
	for i=1, Number, 1 do
    Alert_Logic (i, Last_Period);
    end
	
	
	

end




 

function Alert_Logic (id, period)



   
   
  
  
	if not  Alert_ON[id]  then
	return;
	end
	
	  
	    if   Alert[id][period-3]== 1  then   
		 
			           
  	   
							  if ItIs[id]~=source:serial(period)  
							  --and not FIRST 
							  and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag~= false))
							  --and  (not OnlyOnce or (OnlyOnce and OnlyOnceFlag== true))
							  then
							  
							  ItIs[id]=source:serial(period);
							  SoundAlert(Sound[id]);
							  EmailAlert( Label1[id], Label2[id]);
							  SendAlert( Label1[id],Label2[id],period); 
							  Pop(Label1[id], Label2[id], period );  
							  OnlyOnceFlag=false;
							  end 
		else
		
							   ItIs[id]=nil;
			 
			
	    end
		
 
	  
		   
       -- if FIRST then
        --FIRST=false;      
       -- end		

end

 

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

  terminal:alertSound(internal_sound, RecurrentSound);
end

 


function EmailAlert( label1,label2 )

if not SendEmail then
return
end
 
   local now = core.host:execute("getServerTime");
	now = core.host:execute ("convertTime",  core.TZ_EST, ToTime, now);
	local DATA = core.dateToTable (now);
    
   --delim == djelim == new line	
   local delim = "\013\010";  
   local Note=  profile:id().. delim.. " Label : " ..label1  .. delim .. "Alert : " .. label2 ;   
   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(label1,label2 , period)
 
 
 if not Show then
   return;
   end
 
   local now = core.host:execute("getServerTime");
	now = core.host:execute ("convertTime",  core.TZ_EST, ToTime, now);
	local DATA = core.dateToTable (now);
   
   local delim = "\013\010";   
	
   local Symbol= "Instrument : " .. source:instrument() ;
   local TF= "Time Frame : " .. source:barSize();   
    local Time =  "Date : " .. DATA.month.." / ".. DATA.day .. delim .. "Time:  ".. DATA.hour  .." / ".. DATA.min .." / ".. DATA.sec; 
    local Text= Symbol .. delim ..  TF .. delim ..  Time.. delim ..  label1 .. ":" ..    label2     
   core.host:execute ("prompt", 1, profile:id(),  Text );


end

function SoundAlert(sound_file)
 if not PlaySound then
 return;
 end
 
 terminal:alertSound(sound_file, RecurrentSound);
end

 
function SendAlert(label1,label2, period)
    if not ShowAlert then
        return;
    end
	
	local delim = "\013\010";  
	
	 local now = core.host:execute("getServerTime");
	now = core.host:execute ("convertTime",  core.TZ_EST, ToTime, now);
	local DATA = core.dateToTable (now);
	
   local Symbol= "Instrument : " .. source:instrument() ;
   local TF= "Time Frame : " .. source:barSize();   
    local Time =  "Date : " .. DATA.month.." / ".. DATA.day .. delim ..  "Time :"   .. DATA.hour  .. " / ".. DATA.min .." / ".. DATA.sec; 
  
    local Text= Symbol .. delim ..  TF .. delim ..  Time.. delim ..  label1 .. ":" ..    label2  
	
 
    terminal:alertMessage(source:instrument(), source[NOW], Text, source:date(NOW));
end



local init = false;
 
function Draw(stage, context)
 
	 if stage~= 2 then
	  return;
	  end
	  
	  
	
        if not init then
		   for Level = 1 , Number ,  1 do
           context:createFont (Level, Font[Level], context:pointsToPixels (Size[Level]), context:pointsToPixels (Size[Level]), 0);
		   end
            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 , Number ,  1 do
					   if Alert[Level]:hasData(period) and Signal_ON[Level] then
						 
							if Alert[Level][period]== 1
							and Alert[Level][period-1]~= 1
							then
							visible, y = context:pointOfPrice (AlertLevel[Level][period]);
							
							  width, height = context:measureText (1,  Symbols[Level], 0);

                              if Alignment[Level][period]==-1 then
							   context:drawText (Level,  Symbols[Level], Color[Level], -1,  x-width/2 ,  y , x+width/2 , y+height, 0 );	--low
							  else
							   context:drawText (Level,  Symbols[Level], Color[Level], -1,  x-width/2 ,  y-height , x+width/2 , y, 0 );	--high, have my arrow above the high
							  end
							  
				   
							 end
					  end
						
				 
				end
		end
		
  
end		
 
 --^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 

function processBullish(period)
    if isTrough(period) then
        local curr, prev;
        curr = period;
        prev = prevTrough(period);
        if prev ~= nil then
            if Stochastic.K[curr] > Stochastic.K[prev] and source.low[curr] < source.low[prev] then
                --if I then
                    DN:set(curr, Stochastic.K[curr], "\225", "Classic bullish");
      
                    core.host:execute("drawLine", source:serial(curr), source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], DN_color);
                    Signal[curr]=1;     
            --else
            --        DN[period] = curr - prev;
            --    end
            elseif Stochastic.K[curr] < Stochastic.K[prev] and source.low[curr] > source.low[prev] then
                DN:set(curr, Stochastic.K[curr], "\225", "Reversal bullish");
             
                core.host:execute("drawLine",  source:serial(curr), source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], DN_color);
                Signal[curr]=3;  
           end
        end

    end
end

function isTrough(period)
    local i;
    if Stochastic.K[period] < Stochastic.K[period - 1] and Stochastic.K[period] < Stochastic.K[period + 1] then
        for i = period - 1, first, -1 do
            if Stochastic.K[i] > 80 then
                return true;
            elseif Stochastic.K[period] > Stochastic.K[i] then
                return false;
            end
        end
    end
    return false;
end

function prevTrough(period)
    local i;
    for i = period - 5, first, -1 do
        if Stochastic.K[i] <= Stochastic.K[i - 1] and Stochastic.K[i] < Stochastic.K[i - 2] and
           Stochastic.K[i] <= Stochastic.K[i + 1] and Stochastic.K[i] < Stochastic.K[i + 2] then
           return i;
        end
    end
    return nil;
end

function processBearish(period)
    if isPeak(period) then
        local curr, prev;
        curr = period;
        prev = prevPeak(period);
        if prev ~= nil then
            if Stochastic.K[curr] < Stochastic.K[prev] and source.high[curr] > source.high[prev] then
              -- if I then
                    UP:set(curr, Stochastic.K[curr], "\226", "Classic bearish");
             
                    core.host:execute("drawLine",  source:serial(curr), source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], UP_color);
                    Signal[curr]=2; 
				--else
                    UP[period] = curr - prev;
                --end
            elseif Stochastic.K[curr] > Stochastic.K[prev] and source.high[curr] < source.high[prev] then
                UP:set(curr, Stochastic.K[curr], "\226", "Reversal bearish");
             
                core.host:execute("drawLine",  source:serial(curr), source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], UP_color);
                 Signal[curr]=4;   
			end
        end

    end
end

function isPeak(period)
    local i;
    if Stochastic.K[period] > Stochastic.K[period - 1] and Stochastic.K[period] > Stochastic.K[period + 1] then
        for i = period - 1, first, -1 do
            if Stochastic.K[i] < 20 then
                return true;
            elseif Stochastic.K[period] < Stochastic.K[i] then
                return false;
            end
        end
    end
    return false;
end

function prevPeak(period)
    local i;
    for i = period - 5, first, -1 do
        if Stochastic.K[i] >= Stochastic.K[i - 1] and Stochastic.K[i] > Stochastic.K[i - 2] and
           Stochastic.K[i] >= Stochastic.K[i + 1] and Stochastic.K[i] > Stochastic.K[i + 2] then
           return i;
        end
    end
    return nil;
end