-- Id: 9751
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=59136


--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC | 
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |                    
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  | 
--|                                    Paypal: https://goo.gl/9Rj74e |
--+------------------------------------------------------------------+
--|                                Patreon :  https://goo.gl/GdXWeN  |  
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |  
--|                BitCoin Cash: 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg  | 
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |  
--|                   LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD  |  
--+------------------------------------------------------------------+

-- 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("Candle Ratio");
    indicator:description("Candle Ratio");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
	indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("Period", "Candle Ratio Period", "Period", 21);
	indicator.parameters:addInteger("MA_Period", "MA Period", "Period", 21);
	
	indicator.parameters:addString("Method", "MA Method", "Method" , "MVA");
    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("Style");
    indicator.parameters:addColor("Up", "Color of Ratio", "Color of Ratio", core.rgb(0, 255, 0));
	indicator.parameters:addInteger("width1", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style1", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style1", core.FLAG_LINE_STYLE);
	indicator.parameters:addColor("Dn", "Color of Signal Line", "Color of Signal Line", core.rgb(255, 0, 0));
	indicator.parameters:addInteger("width2", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style2", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style2", 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 Period;
local MA_Period;
local first;
local source = nil;

-- Streams block
local Ratio = nil;
local Up, Dn;
local Method, MA, ma;
-- Routine
function Prepare(nameOnly)
    Period = instance.parameters.Period;
	Method = instance.parameters.Method;
	MA_Period = instance.parameters.MA_Period;
    source = instance.source;
    first = source:first()+Period;
	
	local name = profile:id() .. "(" .. source:name() .. ", " .. tostring(Period) .. ", " .. tostring(Method) .. ", " .. tostring(MA_Period).. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end
	
	Up = instance:addInternalStream(0, 0);
	Dn = instance:addInternalStream(0, 0);

    

  
        Ratio = instance:addStream("Ratio", core.Line, name, "Ratio", instance.parameters.Up, first);
		Ratio:setWidth(instance.parameters.width1);
        Ratio:setStyle(instance.parameters.style1);
		
		ma = core.indicators:create(Method, Ratio, MA_Period);
		
		MA = instance:addStream("MA", core.Line, name, "MA", instance.parameters.Dn, ma.DATA:first());
		MA:setWidth(instance.parameters.width2);
        MA:setStyle(instance.parameters.style2);
		
		Ratio:setPrecision(math.max(2, instance.source:getPrecision()));
		MA:setPrecision(math.max(2, instance.source:getPrecision()));
   
end

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


    if source.close[period] > source.open[period] then
    Up[period]=source.close[period]-source.open[period];
	Dn[period]=0;
	else
	Dn[period]=source.open[period]-source.close[period];
	Up[period]=0;
	end
	
    if period < first  then
	return;
	end
	
	
	
        Ratio[period] = mathex.sum(Up, period-Period+1, period)/mathex.sum(Dn, period-Period+1, period);
		
		ma:update(mode);
		
		if period < ma.DATA:first() then
        return;
        end
  		
		MA[period]= ma.DATA[period];
    
end