-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=63609

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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("Price Multiplier");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Indicator);

	
	indicator.parameters:addGroup("Calculation");
	indicator.parameters:addDouble("Multiplier", "Multiplier", "", 1 );
    
 
	indicator.parameters:addGroup("Style");
	indicator.parameters:addColor("color", "Line color", "", core.rgb(0, 255, 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;
local Multiplier;
local Output;


function Prepare(nameOnly) 

    Multiplier = instance.parameters.Multiplier; 
	source = instance.source;
	first=source:first();
	
	local name = profile:id() .. "(" .. source:name() .. ", " .. Multiplier	..  ")";
    instance:name(name);
	if   (nameOnly) then
        return;
    end
	
	Output = instance:addStream("Output", core.Line, name, "", instance.parameters.color, first);
	Output:setWidth(instance.parameters.width);
    Output:setStyle(instance.parameters.style);
end

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


    if period < first then
    return;
	end
	
    Output[period]= source[period]*Multiplier;

		
 end