-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=65816

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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("RSI Value on Chart");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Indicator);


	indicator.parameters:addGroup("Calculation");
	indicator.parameters:addString("TF", "Bar Size to display High/Low", "", "D1");
	indicator.parameters:setFlag("TF", core.FLAG_PERIODS);
	indicator.parameters:addInteger("Period", " Period","" , 14);
	indicator.parameters:addGroup("Placement");
	indicator.parameters:addString("Y", " Y Placement","" , "Top");
    indicator.parameters:addStringAlternative("Y", "Top", "Top" , "Top");
    indicator.parameters:addStringAlternative("Y", "Bottom", "Bottom" , "Bottom"); 
	
	indicator.parameters:addString("X", " X Placement","" ,  "Right");
    indicator.parameters:addStringAlternative("X", "Right", "Right" , "Right");
    indicator.parameters:addStringAlternative("X", "Left", "Left" , "Left"); 
    indicator.parameters:addInteger("ShiftY", "Shift","" , 0);
 
	
	indicator.parameters:addGroup("Style");
   indicator.parameters:addColor("Label", "Label Color", "", core.rgb(0, 0, 0)); 
   indicator.parameters:addInteger("Size", "Font Size", "", 20);
    indicator.parameters:addColor("color", "Line Color", "", 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 RSI;
local first;
local source = nil;
local X,Y;
local font;
local Label;
local Size;
local ShiftY;
local TF;
local dayoffset,weekoffset; 
local SourceData, loading;
-- Routine
 function Prepare(nameOnly)   
 
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
	 
    dayoffset = core.host:execute("getTradingDayOffset");
    weekoffset = core.host:execute("getTradingWeekOffset");

    Y=instance.parameters.Y;
	X=instance.parameters.X;  
	
	Period=instance.parameters.Period;
	TF=instance.parameters.TF;
	
	ShiftY=instance.parameters.ShiftY;
    Label=instance.parameters.Label;
	Size=instance.parameters.Size;   
    source = instance.source;
    
	
	SourceData = core.host:execute("getSyncHistory", source:instrument(), TF, source:isBid(), 300, 100, 101);
	loading=true;
	
	RSI = core.indicators:create("RSI",SourceData.close, Period);
	
 
	
 
    instance:ownerDrawn(true);

	
end

function   Initialization(period)

    local Candle;
    Candle = core.getcandle(TF, source:date(period), dayoffset, weekoffset);

  
    if loading or SourceData:size() == 0 then
        return false ;
    end

    
    if period < source:first() then
        return false;
    end

    local p = core.findDate(SourceData, Candle, false);

    -- candle is not found
    if p < 0 then
        return false;
	else return p;	
    end
	
end	

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


       
RSI:update(mode);

end
 
local init = false;
 
function Draw(stage, context)
 
	  if stage~= 2 
	  or loading
	  then
	  return;
	  end
	
        if not init then
           context:createFont (1, "Arial", context:pointsToPixels (Size), context:pointsToPixels (Size), 0);
            init = true;
        end
	
			
	local Text1=  "RSI : " ..   win32.formatNumber(	RSI.DATA[RSI.DATA:size()-1], false, source:getPrecision());
	

	 
   local i=1;	 
   width, height = context:measureText (1, Text1, 0);
   context:drawText (1,  Text1, Label, -1,  iX(context,width,0,1) ,  iY(context,height,i,0) ,iX(context,width,0,2),iY(context,height,i,1), 0 );	
   

end		
 
 

function iX(context, width,Shift,x)

	if X== "Left" then
	return  context:left()+ Shift*width +  width*(x-1) ;
	else
	return context:right() - width*Shift -  width*(1-(x-1));
	end
end



function iY(context, height,Index , Line)

	if Y== "Top" then
		return context:top()+Index*height +ShiftY*height + Line *height;
	else
		if Line== 1 then
		return context:bottom()-(Index+1)*height -ShiftY*height + height;
		else
		return context:bottom()-(Index+1)*height -ShiftY*height;
		end
	end
end

-- the function is called when the async operation is finished
function AsyncOperationFinished(cookie)
    if cookie == 100 then
        loading = false;
        instance:updateFrom(0);
    elseif cookie == 101 then
        loading = true;
    end
end