-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=72525

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-- Indicator profile initialization routine

function Init()
    indicator:name("ATR adaptive Period");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
	
	indicator.parameters:addGroup("ATR Calculation"); 
    indicator.parameters:addInteger("Period", "Period", "", 14, 2, 2000); 
	
	indicator.parameters:addGroup("Style"); 	
    indicator.parameters:addColor("color", "Line Color", "", core.rgb(255, 0, 0));
	indicator.parameters:addInteger("style", "Line Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LEVEL_STYLE);	
	indicator.parameters:addInteger("width", "Line Width", "", 3, 1, 5);
	
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block

local Period;
 
local first;
local source = nil;
 
local Oscillator,Indicator;   

-- Routine
 function Prepare(nameOnly)   
 
 
 
 
 
    Period = instance.parameters.Period;
	
	
	local Parameters= Period;
 
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end

    
			
    source = instance.source;
    
  
    Indicator  = core.indicators:create("ATR", source , Period);
    
    first=Indicator.DATA:first() ;
	
	 
   
 
	Oscillator = instance:addStream("Oscillator" , core.Line, " Oscillator"," Oscillator",instance.parameters.color, first);
	Oscillator:setWidth(instance.parameters.width);
    Oscillator:setStyle(instance.parameters.style);
    Oscillator:setPrecision(math.max(2, source:getPrecision()));
	
	
end

-- Indicator calculation routine
function Update(period, mode)

 
 
    Indicator:update(mode);
	
	
    if period < first+Period then
	return;
	end
	
	local min,max, pmin, pmax= mathex.minmax(Indicator.DATA, period-Period+1,period);
	
		
     Oscillator[period]=math.abs(pmin - pmax);
				  
end