-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=70916

--+------------------------------------------------------------------+
--|                               Copyright © 2021, 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  |
--+------------------------------------------------------------------+
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |
--+------------------------------------------------------------------+


-- Indicator profile initialization routine

function Init()
    indicator:name("Price MA Diffrence");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Oscillator);
	
 
    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addString("Method1", "Method1", "", "ZeroLagEMA");
    indicator.parameters:addStringAlternative("Method1", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("Method1", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("Method1", "Wilder", "", "Wilder");
    indicator.parameters:addStringAlternative("Method1", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("Method1", "SineWMA", "", "SineWMA");
    indicator.parameters:addStringAlternative("Method1", "TriMA", "", "TriMA");
    indicator.parameters:addStringAlternative("Method1", "LSMA", "", "LSMA");
    indicator.parameters:addStringAlternative("Method1", "SMMA", "", "SMMA");
    indicator.parameters:addStringAlternative("Method1", "HMA", "", "HMA");
    indicator.parameters:addStringAlternative("Method1", "ZeroLagEMA", "", "ZeroLagEMA");
    indicator.parameters:addStringAlternative("Method1", "DEMA", "", "DEMA");
    indicator.parameters:addStringAlternative("Method1", "T3", "", "T3");
    indicator.parameters:addStringAlternative("Method1", "ITrend", "", "ITrend");
    indicator.parameters:addStringAlternative("Method1", "Median", "", "Median");
    indicator.parameters:addStringAlternative("Method1", "GeoMean", "", "GeoMean");
    indicator.parameters:addStringAlternative("Method1", "REMA", "", "REMA");
    indicator.parameters:addStringAlternative("Method1", "ILRS", "", "ILRS");
    indicator.parameters:addStringAlternative("Method1", "IE/2", "", "IE/2");
    indicator.parameters:addStringAlternative("Method1", "TriMAgen", "", "TriMAgen");
    indicator.parameters:addStringAlternative("Method1", "JSmooth", "", "JSmooth");
    indicator.parameters:addStringAlternative("Method1", "KAMA", "", "KAMA");
    indicator.parameters:addStringAlternative("Method1", "ARSI", "", "ARSI");
    indicator.parameters:addStringAlternative("Method1", "VIDYA", "", "VIDYA");
    indicator.parameters:addStringAlternative("Method1", "HPF", "", "HPF");
    indicator.parameters:addStringAlternative("Method1", "VAMA", "", "VAMA");


    indicator.parameters:addInteger("Period1", "Period", "", 20);
 
	
	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 Period1,Method1; 
local first;
local source = nil;
 
local Oscillator;  
local MA;
-- Routine
 function Prepare(nameOnly)   
 
 
    Period1= instance.parameters.Period1;
	Method1= instance.parameters.Method1;
	
	
	local Parameters= Method1 ..", "..Period1;
 
    local name = profile:id() .. "(" ..  instance.source:name() ..  ", " ..  Parameters .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end

    assert(core.indicators:findIndicator("AVERAGES") ~= nil, "Please, download and install AVERAGES.LUA indicator");
			
    source = instance.source; 
	MA = core.indicators:create("AVERAGES", source, Method1, Period1);
    first=MA.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)

    MA:update(mode);
	if period < first 
	then
	return;
	end
	 
		
     Oscillator[period]= source[period]-MA.DATA[period];
				  
end