-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=73371

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

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--|                                           Our work would not be possible without your support. |
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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("Middle-High-Low Moving Average");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);

  
 	indicator.parameters:addGroup("Calculation");	
 
    indicator.parameters:addInteger("length", "Length", "", 14, 1, 2000);
    indicator.parameters:addInteger("mhlRange", "High-Low Range", "", 10, 1, 2000);
	
	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:addBoolean("highlightMovements", "Highlight Movements", "", true);	
	
	indicator.parameters:addGroup("Line Style");	
    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:addColor("color1", "Up Line Color", "", core.rgb(0, 255, 0)); 
	indicator.parameters:addColor("color2", "Down 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 first;
local source = nil;
local length, mhlRange,Method,highlightMovements; 
local Indicator;
	
-- Routine
 function Prepare(nameOnly)   
 
    
	length=instance.parameters.length;
	mhlRange=instance.parameters.mhlRange;
	Method=instance.parameters.Method;
	highlightMovements=instance.parameters.highlightMovements;
	source = instance.source
 
    local name = profile:id() .. "(" ..  instance.source:name().. "," ..  length.. "," ..  mhlRange .. "," ..  Method .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	

	first=source:first()+mhlRange ; 
	
	
	mhl = instance:addInternalStream(0, 0); 	
	Indicator= core.indicators:create(Method, mhl, length);
	
    Line = instance:addStream("Line", core.Line, name, "Line", instance.parameters.color1, first+length );
    Line:setPrecision(math.max(2, instance.source:getPrecision()));
    Line:setWidth(instance.parameters.width);
    Line:setStyle(instance.parameters.style);
    Line:addLevel(0);	
 
end


function Update(period, mode)



	if period <= first
	or  not source:hasData(period) 
	then
	return;
	end
	
	local min,max= mathex.minmax(source, period-mhlRange+1, period);
	mhl[period]=(max+min)/2;
	
	
	Indicator:update(mode); 	
	
	if period <= first+length
	or  not source:hasData(period) 
	then
	return;
	end	  
	
	Line[period]= Indicator.DATA[period];
	
	if highlightMovements then
		if Line[period] > Line[period-1] then	
		Line:setColor(period, instance.parameters.color1);	
		else
		Line:setColor(period, instance.parameters.color2);	
		end
	end

 end

--+------------------------------------------------------------------------------------------------+
--|                                                                    We appreciate your support. | 
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+


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--|BitCoin                    : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF                                 |  
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--|BitCoin Cash               : 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg                                 | 
--|LiteCoin                   : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD                                 |  
--+------------------------------------------------------------------------------------------------+