-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=72421

--+------------------------------------------------------------------------------------------------+
--|                                                            Copyright © 2022, Gehtsoft USA LLC  | 
--|                                                                         http://fxcodebase.com  |
--+------------------------------------------------------------------------------------------------+
--|                                                              Support our efforts by donating   | 
--|                                                                 Paypal: https://goo.gl/9Rj74e  |
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+

--Your donations will allow the service to continue onward.
--+------------------------------------------------------------------------------------------------+
--|BitCoin                    : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF                                 |  
--|Ethereum                   : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D                         |  
--|SOL Address                : 4tJXw7JfwF3KUPSzrTm1CoVq6Xu4hYd1vLk3VF2mjMYh                       |
--|Cardano/ADA                : addr1v868jza77crzdc87khzpppecmhmrg224qyumud6utqf6f4s99fvqv         |  
--|Dogecoin Address           : DBGXP1Nc18ZusSRNsj49oMEYFQgAvgBVA8                                 |
--|SHIB Address               : 0x1817D9ebb000025609Bf5D61E269C64DC84DA735                         |              
--|Binance(ERC20 & BSC only)  : 0xe84751063de8ade7c5fbff5e73f6502f02af4e2c                         | 
--|BitCoin Cash               : 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg                                 | 
--|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("Fisher No Repainting");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

  
 	indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("RangePeriods", "Range Period", "", 10, 1, 2000);
    indicator.parameters:addDouble("PriceSmoothing", "Price Smoothing", "", 0.3, 0, 0.9999);
    indicator.parameters:addDouble("IndexSmoothing", "Index Smoothing", "", 0.3, 0, 0.9999);	
	
 
	
	 indicator.parameters:addGroup("Bar Style");	
	 indicator.parameters:addColor("color1", "Up Bar Color", "", core.rgb(0, 255, 0)); 
	 indicator.parameters:addColor("color2", "Down Bar Color", "", core.rgb(255, 0, 0)); 

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 first;
local source = nil;
local RangePeriods, PriceSmoothing,IndexSmoothing; 
local Indicator;
local Gi_112;	
-- Routine
 function Prepare(nameOnly)   
 
    
	RangePeriods=instance.parameters.RangePeriods;
	PriceSmoothing=instance.parameters.PriceSmoothing;
	IndexSmoothing=instance.parameters.IndexSmoothing;	
	source = instance.source
	
	Gi_112 = RangePeriods * 2 + 4;
 
    local name = profile:id() .. "(" ..  instance.source:name().. "," ..  RangePeriods.. "," ..  PriceSmoothing.. "," ..  IndexSmoothing   .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	 
	first=source:first() +Gi_112; 
	
	
	G_ibuf_128 = instance:addInternalStream(0, 0);
 
	
	
    Bar = instance:addStream("Bar", core.Bar, name, "Bar", instance.parameters.color1, first );
    Bar:setPrecision(math.max(2, instance.source:getPrecision())); 
    Bar:addLevel(0);	
 
end


function Update(period, mode)

	 

	 if period <= first then
	 return;
	 end
	 
	 
	local  Ld_36;
    local  Ld_52; 
   
   local low_4, Ld_12= mathex.minmax(source, period-RangePeriods+1, period)
   
   if (Ld_12 - low_4 < source:pipSize() / 10.0) then Ld_12 = low_4 + source:pipSize() / 10.0; end
   
   
   local  Ld_20 = Ld_12 - low_4;
   local  Ld_28 = (source.high[period] + source.low[period]) / 2.0;
   
   if (Ld_20 ~= 0.0) then
      Ld_36 = (Ld_28 - low_4) / Ld_20;
      Ld_36 = 2.0 * Ld_36 - 1.0;
   end
   
   
   
   G_ibuf_128[period] = PriceSmoothing * (G_ibuf_128[period- 1]) + (1.0 - PriceSmoothing) * Ld_36;
   local  Ld_44 = G_ibuf_128[period];
   if (Ld_44 > 0.99)  then Ld_44 = 0.99; end
   if (Ld_44 < -0.99)  then Ld_44 = -0.99; end
   if (1 - Ld_44 ~= 0.0) then
   Ld_52 = math.log((Ld_44 + 1.0) / (1 - Ld_44)); 
   end
   
    
    Bar[period] = IndexSmoothing * (Bar[period - 1]) + (1.0 - IndexSmoothing) * Ld_52;  
	
	if Bar[period] > 0 then
	Bar:setColor(period,  instance.parameters.color1); 
	else
	Bar:setColor(period,  instance.parameters.color2); 
	end
	
	
end