-- Id: 23819
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=67316

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-- Indicator profile initialization routine

function Init()
    indicator:name("Smoothed Indexed Rate Of Change");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Oscillator);
	
	indicator.parameters:addGroup("1. MA Calculation"); 
    indicator.parameters:addInteger("Period1", "Period", "", 36, 1, 2000);
 
 
	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:addGroup("2. MA Calculation"); 
    indicator.parameters:addInteger("Period2", "Period", "", 8, 1, 2000);
 
	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:addGroup("RSI Calculation"); 
    indicator.parameters:addInteger("Period3", "RSI Period", "", 3, 1, 2000);
	
	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);
	
	
	
	indicator.parameters:addGroup("OB/OS Levels");	
    indicator.parameters:addDouble("overbought", "Overbought Level","", 80);
    indicator.parameters:addDouble("oversold","Oversold Level","", 20);
	    indicator.parameters:addColor("level_overboughtsold_color", "Line Color","", core.rgb(128, 128, 128));
    indicator.parameters:addInteger("level_overboughtsold_width","Line width","", 1, 1, 5);
    indicator.parameters:addInteger("level_overboughtsold_style", "Line Style","", core.LINE_SOLID);
    indicator.parameters:setFlag("level_overboughtsold_style", core.FLAG_LEVEL_STYLE);


	
end

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

local Method1, Period1;
local Method2 , Period2; 
local Period3;
local first;
local source = nil;
 
local Oscillator;  
local MA1;
local MA2;
local RSI;
local tmp;
-- Routine
 function Prepare(nameOnly)   
 
 
 
 
 
    Period1= instance.parameters.Period1;
    Method1= instance.parameters.Method1; 
	
	Period2= instance.parameters.Period2;
    Method2= instance.parameters.Method2;
 
	
	Period3= instance.parameters.Period3;
	
	
	local Parameters= Period1 ..  ", " .. Method1  ..  ", " ..Period2 ..  ", " .. Method2 ..  ", " .. Period3;
 
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end

    
			
    source = instance.source;
    
  
    assert(core.indicators:findIndicator(Method1) ~= nil, Method1 .. " indicator must be installed");
    MA1 = core.indicators:create(Method1, source , Period1);
	
	tmp = instance:addInternalStream(0, 0);
	
    assert(core.indicators:findIndicator(Method2) ~= nil, Method2 .. " indicator must be installed");
    MA2 = core.indicators:create(Method2, tmp, Period2);
    RSI = core.indicators:create("RSI", MA2.DATA, Period3);
    first=RSI.DATA:first();
	
	 
   
 
	Oscillator = instance:addStream("Oscillator" , core.Line, " Oscillator"," Oscillator",instance.parameters.color, first);
	Oscillator:setWidth(instance.parameters.width);
    Oscillator:setStyle(instance.parameters.style);
    Oscillator:setPrecision(math.max(2, source:getPrecision()));
	
	Oscillator:addLevel(instance.parameters.oversold, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
	Oscillator:addLevel(instance.parameters.overbought, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color); 
    Oscillator:addLevel(50, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color); 	
	
	
end

-- Indicator calculation routine
function Update(period, mode)

 
 
    MA1:update(mode);
	
	if period < MA1.DATA:first() + Period1 then
	return;
	end
	tmp[period] = (source[period]-MA1.DATA[period])/MA1.DATA[period-Period1+1]
	
	
    MA2:update(mode);
	RSI:update(mode);
 
	if period < first then
	return;
	end
		
     Oscillator[period]=RSI.DATA[period] ;
				  
end