-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=72907

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--|                                                        https://AppliedMachineLearning.systems  |
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-- 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("Fractal Chaos Bands");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);

  
 	indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("Period", "Period", "", 20, 1, 2000);

	
	 indicator.parameters:addGroup("Line Style");	
    indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE);
	
	 indicator.parameters:addColor("color1", "Top Line Color", "", core.rgb(0, 255, 0)); 
	 indicator.parameters:addColor("color2", "Bottom Line Color", "", core.rgb(288, 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 Period; 
local Indicator;
	
-- Routine
 function Prepare(nameOnly)   
 
    
	Period=instance.parameters.Period;
	source = instance.source
 
    local name = profile:id() .. "(" ..  instance.source:name().. "," ..  Period  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
	--Indicator= core.indicators:create("AO", source, Period1, Period2);
	first=source:first() +2; 
	
	
	HIfractal = instance:addInternalStream(0, 0);
	LOfractal = instance:addInternalStream(0, 0); 
	
	
    Top = instance:addStream("Top", core.Line, name, "Top", instance.parameters.color1, first+Period );
    Top:setPrecision(math.max(2, instance.source:getPrecision()));
    Top:setWidth(instance.parameters.width);
    Top:setStyle(instance.parameters.style);
    Top:addLevel(0);	
 
    Bottom = instance:addStream("Bottom", core.Line, name, "Bottom", instance.parameters.color2, first+Period );
    Bottom:setPrecision(math.max(2, instance.source:getPrecision()));
    Bottom:setWidth(instance.parameters.width);
    Bottom:setStyle(instance.parameters.style);
    Bottom:addLevel(0);	
end


function Update(period, mode)

	--  Indicator:update(mode); 

	 if period <= first then
	 
    HIfractal[period] = source.high[period];
    LOfractal[period] =  source.low[period];	 
	 return;
	 end
	 
	 
	 
	if source.high[period-1] > source.high[period-2] and source.high[period-1] > source.high[period] then
	   HIfractal[period] = source.high[period-1]
	else
	   HIfractal[period] = HIfractal[period-1]
	end

	if source.low[period-1]  < source.low[period-2]  and source.low[period-1]  < source.low[period] then
	   LOfractal[period] = source.low[period-1]
	else
	   LOfractal[period] = LOfractal[period-1]
	end
	 
	  
   if period <= first+Period then
   return;
   end
   
	Top[period]= mathex.max(HIfractal, period-Period+1, period);
	Bottom[period]= mathex.max(LOfractal, period-Period+1, period);
end

 


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--|                                                                    We appreciate your support. | 
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--|                                                               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/ |
--+------------------------------------------------------------------------------------------------+