-- Id: 10731
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=60136

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function Init()
    indicator:name("Trend Confirmation Index");
    indicator:description("Trend Confirmation Index");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
     indicator.parameters:addGroup("Calculation");	
	 indicator.parameters:addInteger("Period", "MA Period", "Period" , 14);
	indicator.parameters:addString("Method", "MA Method", "Method" , "MVA");
    indicator.parameters:addStringAlternative("Method", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method", "EMA", "EMA" , "EMA");
 indicator.parameters:addStringAlternative("Method", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method", "WMA", "WMA" , "WMA");
	
	
	indicator.parameters:addGroup("Style");	
    indicator.parameters:addColor("TCI_color", "Color of TCI", "Color of TCI", 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:addBoolean("Show", "Show Actual", "", false);
	indicator.parameters:addColor("Actual_color", "Color of Actual", "Color of Actual", core.rgb(0, 0, 255));
	
	indicator.parameters:addGroup("OB/OS Levels");	
    indicator.parameters:addDouble("overbought", "Overbought Level","", 70);
    indicator.parameters:addDouble("oversold","Oversold Level","", 30);
	    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 first;
local source = nil;
local Method;
-- Streams block
local TCI = nil;
local MA,Period, Raw,Actual,Show;
-- Routine
function Prepare(nameOnly)
    source = instance.source;
	Method=instance.parameters.Method;	
	Period=instance.parameters.Period;
	Show=instance.parameters.Show;
	
    local name = profile:id() .. "(" .. source:name().. ", " .. Period.. ", " .. Method .. ")";
    instance:name(name);

    if (not (nameOnly)) then
        if Show then
        Raw = instance:addStream("Actual", core.Dot, name, "TCI Actual", instance.parameters.Actual_color, source:first());
    Raw:setPrecision(math.max(2, instance.source:getPrecision()));
        else
        Raw = instance:addInternalStream(0, 0);
        end
     
    assert(core.indicators:findIndicator(Method) ~= nil, Method .. " indicator must be installed");
        MA = core.indicators:create(Method, Raw, Period);
        first = source:first();
        TCI = instance:addStream("TCI", core.Line, name, "TCI Average", instance.parameters.TCI_color, MA.DATA:first());
    TCI:setPrecision(math.max(2, instance.source:getPrecision()));
		TCI:setWidth(instance.parameters.width);
        TCI:setStyle(instance.parameters.style);
		
		
        TCI:addLevel(instance.parameters.oversold, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
		TCI:addLevel(instance.parameters.overbought, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);    
		
		
    end
end

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

    Raw[period]=(source.close[period]-source.low[period]) /  ((source.high[period]-source.low[period])/100);
    if period < first   then
	return;
	end
	MA:update(mode);
	
        TCI[period] = MA.DATA[period];
   
end