-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=60838

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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("CCI Stochastic");
    indicator:description("CCI Stochastic");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
    indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("CCIPeriod", "CCI Period", "CCI Period", 14);
    indicator.parameters:addInteger("StochPeriod", "Stochastic Period", "Stochastic Period", 14);
    indicator.parameters:addInteger("StochSmooth", "Stochastic Smooth", "Stochastic Smooth", 3);
	
	indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("CciStochastic_color", "Color of CciStochastic", "Color of CciStochastic", core.rgb(255, 0, 0));
	indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE);
	
	 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
-- 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 CCIPeriod;
local StochPeriod;
local StochSmooth;
	local  ShowArrows ,ShowArrowsOnZoneEnter,ShowArrowsOnZoneExit,ShowArrowsOnCentalLineCross;
local first;
local source = nil;

-- Streams block
local stoch;
local rawstoch;
local cci;
local ma;
local Text;
local tup,tdown;
local bup,bdown;
local cup,cdown;
local Size;
 
-- Routine
function Prepare(nameOnly)
    CCIPeriod = instance.parameters.CCIPeriod;
    StochPeriod = instance.parameters.StochPeriod;
    StochSmooth = instance.parameters.StochSmooth;
 
    source = instance.source; 
    local name = profile:id() .. "(" .. source:name() .. ", " .. tostring(CCIPeriod) .. ", " .. tostring(StochPeriod) .. ", " .. tostring(StochSmooth) .. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end
	
	 cci = core.indicators:create("CCI", source, CCIPeriod);
	 rawstoch = instance:addInternalStream(0, 0);
	 ma = core.indicators:create("MVA", rawstoch, StochSmooth);
	 first = cci.DATA:first();

     
        stoch = instance:addStream("CciStochastic", core.Line, name, "CCI Stochastic", instance.parameters.CciStochastic_color, ma.DATA:first());
		stoch:addLevel(instance.parameters.oversold, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
		stoch:addLevel(instance.parameters.overbought, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);    
		stoch:addLevel(50, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);    
		stoch:setWidth(instance.parameters.width);
        stoch:setStyle(instance.parameters.style);
		stoch:setPrecision(math.max(4, source:getPrecision()));
 
	 
end

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

    cci:update(mode);
	
   if period < first+StochPeriod  then 
   return;
   end
	
	 local TodayCCI = cci.DATA[period] ; 
     local TodayLowCCI = mathex.min(cci.DATA, period-StochPeriod+1, period ) ; 
     local TodayHighCCI = mathex.max(cci.DATA, period-StochPeriod+1, period ) ; 
   
	   rawstoch[period]=100*(TodayCCI - TodayLowCCI)/(TodayHighCCI - TodayLowCCI);  
    
    ma:update(mode);
	
	if period < ma.DATA:first() then
	return;
	end
	
	stoch[period] = ma.DATA[period];
    
 
end