-- Id: 14618

-- 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("Zero Point Force with Real volume/Transactions");
    indicator:description("Zero Point Force 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("Short", "Short Period", "Short Period", 12);
	indicator.parameters:addString("Method1", "MA Method", "Method" , "MVA");
    indicator.parameters:addStringAlternative("Method1", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method1", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method1", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method1", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method1", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method1", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method1", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method1", "WMA", "WMA" , "WMA");
	
    indicator.parameters:addInteger("Long", "Long Period", "Long Period", 24);
	
	indicator.parameters:addString("Method2", "MA Method", "Method" , "MVA");
    indicator.parameters:addStringAlternative("Method2", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method2", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method2", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method2", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method2", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method2", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method2", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method2", "WMA", "WMA" , "WMA");
	
	   indicator.parameters:addInteger("Volume", "Volume Period", "Volume Period", 12);
	
	indicator.parameters:addString("Method3", "MA Method", "Method" , "MVA");
    indicator.parameters:addStringAlternative("Method3", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method3", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method3", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method3", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method3", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method3", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method3", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method3", "WMA", "WMA" , "WMA");
	
     indicator.parameters:addGroup("Style");
	 indicator.parameters:addInteger("Transparency", "Channel transparency (%)", "", 70, 0, 100);
    indicator.parameters:addColor("Up", "Color of Up Trend", "Color of Up Trend", core.rgb(0, 255, 0));
	indicator.parameters:addColor("Down", "Color of Down Trend", "Color of Down Trend", core.rgb(255, 0, 0));
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 Short;
local Long;
local Volume;
local Method1,Method2,Method2;
local first;
local source = nil;

-- Streams block
local hh = nil;
local ll=nil;
local S, L, C;
local Transparency;
local Ind;

local FirstStart;
local LastTime;
-- Routine
function Prepare(nameOnly)
    Short = instance.parameters.Short;
    Long = instance.parameters.Long;
	Volume = instance.parameters.Volume;
	Method1 = instance.parameters.Method1;
	Method2 = instance.parameters.Method2;
	Method3 = instance.parameters.Method3;
	Transparency = instance.parameters.Transparency;
    source = instance.source;
	
	local name = profile:id() .. "(" .. source:name() .. ", " .. tostring(Short).. ", " .. tostring(Method1) .. ", " .. tostring(Long).. ", " .. tostring(Method2).. ", " .. tostring(Volume).. ", " .. tostring(Method3) .. ")";
    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;
	 assert(source:supportsVolume(), "The source must have volume");
	 
    assert(core.indicators:findIndicator(Method1) ~= nil, Method1 .. " indicator must be installed");
	 S = core.indicators:create(Method1, source.close, Short);
    assert(core.indicators:findIndicator(Method2) ~= nil, Method2 .. " indicator must be installed");
	 L = core.indicators:create(Method2, source.close, Long);
    assert(core.indicators:findIndicator(Method3) ~= nil, Method3 .. " indicator must be installed");
	 V = core.indicators:create(Method3, Ind.DATA, Volume );
	 first = source:first();
	 
	
    if (not (nameOnly)) then
        hh = instance:addStream("UP", core.Line, name, "UP", core.rgb(0, 0, 0), first);
    hh:setPrecision(math.max(2, instance.source:getPrecision()));
		ll = instance:addStream("DOWN", core.Line, name, "DOWN", core.rgb(0, 0, 0), first);
    ll:setPrecision(math.max(2, instance.source:getPrecision()));
		instance:createChannelGroup("ZPF", "ZPF", hh, ll, core.rgb(128, 128, 128), 100 - Transparency);

    end
end

function AsyncOperationFinished(cookie, success, message)

end

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

    S:update(mode);
	L:update(mode);
	V:update(mode);

	   local zpf=V.DATA[period]*(S.DATA[period]-L.DATA[period])/2;
	   
      ll[period]=-zpf;
      hh[period]= zpf;
	  
	  if hh[period] > ll[period] then
	  hh:setColor(period, instance.parameters.Up);	
	  ll:setColor(period, instance.parameters.Up);
	  else
	  hh:setColor(period, instance.parameters.Down);
	   ll:setColor(period, instance.parameters.Down);
	  end

	
   
end