-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=66476

--+------------------------------------------------------------------+
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--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |                    
--|                                          mario.jemic@gmail.com   |
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--+------------------------------------------------------------------+

-- Indicator profile initialization routine

function Init()
    indicator:name("WinMidas");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
 
 
 
	
	indicator.parameters:addGroup("Style"); 	
    indicator.parameters:addColor("color", "Line Color", "", core.rgb(255, 0, 0));
	indicator.parameters:addInteger("style", "Line Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LEVEL_STYLE);	
	indicator.parameters:addInteger("width", "Line Width", "", 3, 1, 5);
	
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block


local first;
local source = nil;
 local Date, Level; 
local Line={};
local   cumpv,cumvol;
-- Routine
 function Prepare(nameOnly)   
 
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end 
	
	Date=0;  
	cumpv= instance:addInternalStream(0, 0); 
	cumvol= instance:addInternalStream(0, 0); 
	
    core.host:execute("addCommand", 100, "Start From Selected Period", "");	
			
    source = instance.source;
    first=source:first(); 
	Line = instance:addStream("Line" , core.Line, " Line"," Line",instance.parameters.color, first);
	Line:setWidth(instance.parameters.width);
    Line:setStyle(instance.parameters.style); 
end


local pattern = "([^;]*);([^;]*)";

function Parse(message)
    local level, date;
    level, date = string.match(message, pattern, 0);
	
    if level == nil or date == nil then
        return 0, 0;
    end
	
    return tonumber(date),tonumber(level) ;
end


-- Indicator calculation routine
function Update(period)

  
    if period < first then
	Line[period]=nil;
	return;
	end
	 
    cumpv[period]= cumpv[period-1]+source.typical[period]*source.volume[period];
	cumvol[period]= cumvol[period-1]+source.volume[period];
	
	if Date<=0 then
	return;
	end
		
		
     Period=core.findDate (source, Date, false);
	 
	 if period < Period
	 then
	 Line[period]=nil;
	 return;
	 end 
 
	  
	 
		sr1=cumpv[period]-cumpv[Period-1];
		sr2=cumvol[period]-cumvol[Period-1];
		Line[period]=sr1/sr2;
	 
		 			
end

function AsyncOperationFinished(cookie, success, message)

    local D,L;
	
	D,L  = Parse(message);

    if cookie == 100 then 
		      Date = D;  
    end
    
     
     
    instance:updateFrom(0);					       
	return core.ASYNC_REDRAW ;
end    


--[[
WinMidas - Ammended Code
eMonth:=Input("Enter the Month - MM",1,12,1);
eDate:=Input("Enter the Date - DD",1,31,1);
eYear:=Input("Enter the Year - YYYY",1900,2100,2001);
numdays:=BarsSince(DayOfMonth()=eDate AND
Month() =eMonth AND Year()=eYear);

pvol:=Typical()*V;
cumpv:=Cum(pvol);
cumvol:=Cum(V);
basecumpv:=ValueWhen(1, numdays=1, Ref(cumpv,-1));
basecumvol:=ValueWhen(1, numdays=1, Ref(cumvol,-1));

sr1:=cumpv-basecumpv;
sr2:=cumvol-basecumvol;
sr:=sr1/sr2;
sr;

]]