-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=72584

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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("Unsmoothed ADX");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

  
 	indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("Period1", "DMI Period", "", 14, 1, 2000);
    indicator.parameters:addInteger("Period2", "ADX Smoothed Period", "", 14, 14, 2000);
	
	indicator.parameters:addString("Method", "ADX Smoothed Method", "Method" , "EMA");
    indicator.parameters:addStringAlternative("Method", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method", "WMA", "WMA" , "WMA");	
	
	 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", "Unsmoothed ADX Line Color", "", core.rgb(0, 255, 0)); 
	 indicator.parameters:addColor("color2", "Smoothed ADX Line 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 Period1, Period2,Method; 
local Indicator;
	
-- Routine
 function Prepare(nameOnly)   
 
    
	Period1=instance.parameters.Period1;
	Period2=instance.parameters.Period2;
	Method=instance.parameters.Method;
	source = instance.source
 
    local name = profile:id() .. "(" ..  instance.source:name().. "," ..  Period1.. "," ..  Period2 .. "," ..  Method  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
    dmi = core.indicators:create("DMI", source, Period1);
	first=dmi.DATA:first() ; 
 
	
	
    ADX = instance:addStream("ADX", core.Line, name, "ADX", instance.parameters.color1, first );
    ADX:setPrecision(math.max(2, instance.source:getPrecision()));
    ADX:setWidth(instance.parameters.width);
    ADX:setStyle(instance.parameters.style);
    ADX:addLevel(0);	

    ema = core.indicators:create(Method, ADX, Period2);
	
    adx = instance:addStream("adx", core.Line, name, "adx", instance.parameters.color2, ema.DATA:first() );
    adx:setPrecision(math.max(2, instance.source:getPrecision()));
    adx:setWidth(instance.parameters.width);
    adx:setStyle(instance.parameters.style);
    adx:addLevel(0); 
end


function Update(period, mode)

	dmi:update(mode); 

	 if period <= first then
	 return;
	 end
	 
    
 
        local plus = dmi.DIP[period];
        local minus = dmi.DIM[period];

        local div = plus + minus;
        if (div == 0) then
            ADX[period] = 0;
        else
            ADX[period] = 100 * (math.abs(plus - minus) / div)
        end
   

 
        ema:update(mode);
		
	 if period <= ema.DATA:first() then
	 return;
	 end

	 
     adx[period] = ema.DATA[period];
 
	 
 
	
end