-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=67200

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC | 
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |                    
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  | 
--|                                    Paypal: https://goo.gl/9Rj74e |
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |  
--|                BitCoin Cash: 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg  | 
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |  
--|                   LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD  |  
--+------------------------------------------------------------------+

-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams
function Init()
    indicator:name("Average Price Bars");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
    indicator:setTag("replaceSource", "t");
	
	
	indicator.parameters:addGroup("Style");
	indicator.parameters:addColor("Up", "Up color", "", core.rgb(0, 255, 0));
	indicator.parameters:addColor("Down", "Down color", "", core.rgb(255, 0, 0));
	indicator.parameters:addColor("Neutral", "Neutral color", "", core.rgb(0, 0, 255));
	
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- TODO: Refine the first period calculation for each of the output streams.
-- TODO: Calculate all constants, create instances all subsequent indicators and load all required libraries
-- Parameters block

local Up,Down, Neutral;
local first;
local source = nil;
 

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

 

local One, Two, Three;


 function Prepare(nameOnly)   
 
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end


    Up = instance.parameters.Up;
    Down= instance.parameters.Down;
    Neutral= instance.parameters.Neutral;
   
	 
	source = instance.source; 
	first= source:first();

    	
	open = instance:addStream("open", core.Line, name, "", core.rgb(0, 0, 0), first);
    high = instance:addStream("high", core.Line, name, "", core.rgb(0, 0, 0), first);
    low = instance:addStream("low", core.Line, name, "", core.rgb(0, 0, 0), first);
    close = instance:addStream("close", core.Line, name, "", core.rgb(0, 0, 0), first);
    instance:createCandleGroup("OVERLAY", "OVERLAY", open, high, low, close);
		
end

-- Indicator calculation routine
function Update(period )

     
	if period < first then
	return;
	end
	
      local AveragePrice =  (source.open[period] + source.high[period] + source.low[period] + source.close[period]) / 4.0;
      open[period] = (AveragePrice + source.close[period]) / 2.0;
      close[period] = (open[period - 1] + (close[period - 1])) / 2.0;
      high[period] = math.max(source.high[period],  close[period-1], open[period]);
      low[period] = math.min(source.low[period], close[period-1], open[period]);
 
	
    
 
	 if close[period]>  open[period] then
	 open:setColor(period, Up);	
	 elseif close[period]<  open[period] then
	 open:setColor(period, Down);			
	 else
	 open:setColor(period, Neutral);	
	 end
		
		
				

		
 end