-- Id: 14546

-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=62412

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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("Rainbow Volume with Real volume/Transactions");
    indicator:description("Rainbow Volume with Real volume/Transactions");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addString("Ind", "Type of indicator", "", "Volume");
    indicator.parameters:addStringAlternative("Ind", "Volume", "", "Volume");
    indicator.parameters:addStringAlternative("Ind", "Transactions", "", "Transactions");

    indicator.parameters:addInteger("Period", "Period", "Period", 10);
	indicator.parameters:addColor("UUC", "Up Price / Up Volume Color", "Up Price / Up Volume Color", core.rgb(0,255,0));
	indicator.parameters:addColor("UDC", "Up Price / Down Volume Color", "Up Price / Down Volume Color", core.rgb(0,0,255));
	indicator.parameters:addColor("DDC", "Down Price / Down Volume Color", "Down Price / Down Volume Color", core.rgb(255,0,0));
	indicator.parameters:addColor("DUC", "Down Price / Up Volume Color", "Down Price / Up Volume Color", core.rgb(255,128,0));
    indicator.parameters:addColor("NC", "Neutral Color", "Neutral Color", core.rgb(128, 128, 128));
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 first;
local source = nil;

-- Streams block
local Volume = nil;
local NC, UUP,DDC, UDC, DUC ;
local Ind;

local FirstStart;
local LastTime;

-- Routine
function Prepare(nameOnly)
    Period = instance.parameters.Period;
	NC = instance.parameters.NC;
	UUC = instance.parameters.UUC;
	DDC = instance.parameters.DDC;
	UDC = instance.parameters.UDC;
	DUC = instance.parameters.DUC;
	source = instance.source;
	
	local name = profile:id() .. "(" .. source:name() .. ", " .. tostring(Period) .. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end

	
     if instance.parameters.Ind=="Volume" then
      Ind=core.indicators:create("REAL VOLUME", source);
     else
      Ind=core.indicators:create("TRANSACTIONS", source);
     end
     FirstStart=true;
     LastTime=0;
	
    first = source:first()+Period;
	
	 assert(source:supportsVolume(), "The source must have volume");

  
    if (not (nameOnly)) then
        Volume = instance:addStream("Volume", core.Bar, name, "Volume", NC, first);
    Volume:setPrecision(math.max(2, instance.source:getPrecision()));
    end
end

function AsyncOperationFinished(cookie, success, message)

end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period, mode)
    
	Volume:setColor(period, NC);
	
	
	if period < first or not source:hasData(period) then
	return;
	end

        Ind:update(mode);
        if not(Ind.DATA:hasData(period)) then
            if period==first then
                FirstStart=true;
            end    
            return;
        elseif FirstStart then
            FirstStart=false;
            instance:updateFrom(first);    
        elseif LastTime~=source:date(period) and period==source:size()-1 then
            LastTime=source:date(period);
            instance:updateFrom(period-10);
        end
	
	
        Volume[period] = Ind.DATA[period];
		
		if source.close[period] > source.close[period-Period] and Ind.DATA[period] > Ind.DATA[period-Period] then		
		Volume:setColor(period, UUC);
		elseif source.close[period] > source.close[period-Period] and Ind.DATA[period] < Ind.DATA[period-Period] then	
		Volume:setColor(period, UDC);
		elseif source.close[period] < source.close[period-Period] and Ind.DATA[period] > Ind.DATA[period-Period] then	
		Volume:setColor(period, DUC);
        elseif source.close[period] < source.close[period-Period] and Ind.DATA[period] < Ind.DATA[period-Period] then	
		Volume:setColor(period, DDC);
		end
end