-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=72179

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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("Ticks Volume Indicator");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
 
  
 	indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("Period1", "1. Period", "", 12, 1, 2000);
    indicator.parameters:addInteger("Period2", "2. Period", "", 12, 1, 2000);
    indicator.parameters:addInteger("Period3", "Signal Period", "", 5, 1, 2000);	
	
	 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", "1. Line Color", "", core.rgb(0, 255, 0)); 
	 indicator.parameters:addColor("color2", "2. 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 Period1,Period2,Period3 ; 
local Indicator;
	
-- Routine
 function Prepare(nameOnly)   
 
    
	Period1=instance.parameters.Period1;
	Period2=instance.parameters.Period2;
	Period3=instance.parameters.Period3;	
	source = instance.source
	first=source:first() ; 
	
    local name = profile:id() .. "(" ..  instance.source:name().. "," ..  Period1.. "," ..  Period2 .. "," ..  Period3 .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end

	UpTicks = instance:addInternalStream(0, 0);
	DownTicks = instance:addInternalStream(0, 0); 
	
	
	EMA1= core.indicators:create("EMA", UpTicks, Period1);
	EMA2= core.indicators:create("EMA", DownTicks, Period1);	
	EMA3= core.indicators:create("EMA", EMA1.DATA, Period2);
	EMA4= core.indicators:create("EMA", EMA2.DATA, Period2);	 
	
    Line1 = instance:addStream("Line1", core.Line, name, "1. Line", instance.parameters.color1, first +Period1 +Period2 );
    Line1:setPrecision(math.max(2, instance.source:getPrecision()));
    Line1:setWidth(instance.parameters.width);
    Line1:setStyle(instance.parameters.style);
    Line1:addLevel(0);
	
	EMA5= core.indicators:create("EMA", Line1, Period3);	

	
    Line2 = instance:addStream("Line2", core.Line, name, "2. Line", instance.parameters.color2, first +Period1 +Period2+Period3 );
    Line2:setPrecision(math.max(2, instance.source:getPrecision()));
    Line2:setWidth(instance.parameters.width);
    Line2:setStyle(instance.parameters.style);
    Line2:addLevel(0);		
 
end

 

function Update(period, mode)



	 if period <= source:first()  then
	 return;
	 end
	 
 
	UpTicks[period]=(source.volume[period]+(source.close[period]-source.open[period])/source:pipSize())/2;
    DownTicks[period]=source.volume[period]-UpTicks[period];
	
	
	EMA1:update(mode); 
	EMA2:update(mode); 

	if period <= EMA2.DATA:first() then
	return;
	end 
	
	EMA3:update(mode); 
	EMA4:update(mode); 		
	
	if period <= EMA4.DATA:first() then
	return;
	end 
	
	Line1[period]=100.0*(EMA3.DATA[period]-EMA4.DATA[period])/(EMA3.DATA[period]+EMA4.DATA[period]); 
	
	EMA5:update(mode); 
	
	if period <= EMA5.DATA:first() then
	return;
	end


	Line2[period]=EMA5.DATA[period]; 
end