-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=724

--+------------------------------------------------------------------------------------------------+
--|                                                            Copyright © 2023, Gehtsoft USA LLC  | 
--|                                                                         http://fxcodebase.com  |
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+

--+------------------------------------------------------------------------------------------------+
--|                                           Our work would not be possible without your support. |
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+
function Init()
    indicator:name("Advanced Fractal Trend Overlay");
    indicator:description("Predicts a reversal in the current trend.");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
  
 	indicator.parameters:addGroup("Calculation");	
	indicator.parameters:addInteger("Fractal", "Number of fractals ", "Number of fractals ", 2, 1,99);	
	
	indicator.parameters:addString("Show", "Show", "Search for ", "Fractal");
	indicator.parameters:addStringAlternative("Show", "Fractal", "", "Fractal");
    indicator.parameters:addStringAlternative("Show", "Trend", "", "Overlay");
    indicator.parameters:addStringAlternative("Show", "Both", "", "Both");	
	
 	indicator.parameters:addGroup("Style");			
    indicator.parameters:addColor("UP", "Up fractal color", "Up fractal color", core.rgb(0,255,0));
    indicator.parameters:addColor("DOWN", "Down fractal color", "Down fractal color", core.rgb(255,0,0));
	indicator.parameters:addColor("U", "Up Trend color", "Up Trend color", core.rgb(0,255,0));
    indicator.parameters:addColor("D", "Down Trend color", "Down Trend color", core.rgb(255,0,0));

	indicator.parameters:addInteger("Size", "Font Size", "", 10, 1 , 100);	 
	

end

local source;
local up, down;
local Fractal=0;
local Rez=0;
local Size;
local first;
local open=nil;
local close=nil;
local high=nil;
local low=nil;
local Show;
local U,D;

local UP, DOWN, TREND;

function Prepare(nameOnly)
    U = instance.parameters.U;
	D = instance.parameters.D;    
	Fractal=instance.parameters.Fractal
	Size = instance.parameters.Size;
	Show= instance.parameters.Show;
	
	source = instance.source;
	first= source:first()+ Fractal;
   
 
  
    local name = profile:id() .. " ( " .. Fractal  .. " )";
    instance:name(name);
	
    if   (nameOnly) then
        return;
    end	
	
	up = instance:createTextOutput ("Up", "Up", "Wingdings", Size, core.H_Center, core.V_Top, instance.parameters.UP, 0);
    down = instance:createTextOutput ("Dn", "Dn", "Wingdings", Size, core.H_Center, core.V_Bottom, instance.parameters.DOWN, 0);
	
	
	open = instance:addStream("open", core.Line, name, "open", core.rgb(0, 0, 0), first)
    high = instance:addStream("high", core.Line, name, "high", core.rgb(0, 0, 0), first)
    low = instance:addStream("low", core.Line, name, "low", core.rgb(0, 0, 0), first)
    close = instance:addStream("close", core.Line, name, "close", core.rgb(0, 0, 0), first)

	instance:createCandleGroup("ZONE", "", open, high, low, close);
end

function Update(period, mode)


    high[period]= source.high[period];
	low[period]= source.low[period];		   
	close[period] = source.close[period];
	open[period]  = source.open[period];	


    
    if (period <= Fractal) then
	return;
	end
	
	
	     local x = period - Fractal; 
		
      local test=true;		
         for i= 1, Fractal, 1 do
		
		     if  source.high[x]  < source.high[x+i]
			 or  source.high[x] < source.high[x-i]
			 then
			 test=false;
			 end
			
		 end	
		 
		 if test then
		   if Show ~= "Overlay" then
 		   up:set(period - Fractal, source.high[x], "\226");
		   end
		   UP= source.high[x]; 
		 end

        test=true;	 
	   
         for i= 1, Fractal, 1 do
		
		     if  source.low[x] > source.low[x+i]
			 or  source.low[x] > source.low[x-i]
			 then
			 test=false;
			 end
			
		 end	
	   
	      if test then
			  if Show ~= "Overlay" then
			  down:set(x, source.low[x], "\225");
			  end
			  DOWN = source.low[x]; 
		  end
		  
		  
		  if UP == nil or DOWN == nil then
		  return;
		  end
		  
		 if core.crossesOver (source.close, UP, period-1 ) then   
		  TREND = true;
		 elseif core.crossesUnder (source.close, DOWN, period-1 ) then   
		  TREND = false;
		 end
		 
		if Show ~= "Fractal" then
		  if TREND then
		  open:setColor(period, U);
		  elseif not TREND then
		  open:setColor(period, D);
		  end
        end
    
end
--+------------------------------------------------------------------------------------------------+
--|                                                                    We appreciate your support. | 
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+


--+------------------------------------------------------------------------------------------------+
--|BitCoin                    : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF                                 |  
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--+------------------------------------------------------------------------------------------------+