-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=63125

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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("Timed Moving Averages");
    indicator:description("Timed Moving Averages");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Indicator);
    indicator.parameters:addGroup("Calculation");
 
    indicator.parameters:addInteger("Duration", "MA Duration in seconds", "MA Duration in seconds", 60);

    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("Color", "Color of MACD", "Color of MACD", core.rgb(255, 0, 0));
	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);
 
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;
-- Streams block
local Duration;
local MA;
local Second; 
-- Routine
 function Prepare(nameOnly)   
 
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
    Duration = instance.parameters.Duration; 
    source = instance.source;
    first=source:first();

   
	local date1= core.datetime (2014, 1, 1, 1, 1, 0);
	local date2= core.datetime (2014, 1, 1, 1, 2, 0);
	Second= ((date2 - date1)/60);
	 
  
        MA = instance:addStream("MA", core.Line, name .. ".MA", "MA", instance.parameters.Color, source:first());
		MA:setWidth(instance.parameters.Width);
        MA:setStyle(instance.parameters.Style);
     
end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period)

	
	if period <= first then
	return;
	end
	
 
	 
	 
	local P1= core.findDate (source, source:date(period)- Second * Duration, false);
	
	if P1==-1
	or P1< first+1 
	or P1>= period
    then
    return;
    end 
	 
		
        MA[period]= mathex.avg(source,P1, period);
     
	 
end