-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=71768

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-- Indicator profile initialization routine

function Init()
    indicator:name("Sma with NET");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Indicator);
	
	indicator.parameters:addGroup("Calculation"); 
    indicator.parameters:addInteger("inpSmaPeriod", "SMA period", "", 14, 1, 2000);
    indicator.parameters:addInteger("inpNetPeriod", "NET period", "", 5, 1, 2000);
	
 
	
	indicator.parameters:addGroup("Style"); 	
    indicator.parameters:addColor("Up", "Up Line Color", "", core.rgb(0, 255, 0));
    indicator.parameters:addColor("Down", "Down 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);
	
end

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

 
local inpSmaPeriod,inpNetPeriod; 
local first;
local source = nil;
local Denom 
local Line;
-- Routine
 function Prepare(nameOnly)   
 
 
    inpSmaPeriod= instance.parameters.inpSmaPeriod;
	inpNetPeriod= instance.parameters.inpNetPeriod;
	
	
	local Parameters= inpSmaPeriod..", "..inpNetPeriod;
 
    local name = profile:id() .. "(" ..  instance.source:name() ..  ", " ..  Parameters .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end

    
			
    source = instance.source; 
    first=source:first()+inpSmaPeriod;
	 
    Denom  = 0.5 * inpSmaPeriod * (inpSmaPeriod - 1); 
   
 
	Line = instance:addStream("Line" , core.Line, " Line"," Line",instance.parameters.Up, first );
	Line:setWidth(instance.parameters.width);
    Line:setStyle(instance.parameters.style);
    Line:setPrecision(math.max(2, source:getPrecision()));
	
	
end

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

 
	if period < first
	then
	return;
	end
	
	
	Line[period]= mathex.avg(source, period-inpSmaPeriod+1, period);
	
   local netNum = 0;	
   local diff;
   
   for k=1, inpNetPeriod,1 do
	   for  j=0, k, 1 do
	   
	    diff    = Line[period-k-1]-Line[period-j-1];
		
		if diff > 0 then
		netNum=netNum-1;
		elseif diff < 0 then
		netNum=netNum+1;		
		end 
	   end
   end
   
    local  net = netNum/Denom;
	
	if net > 0 then
	Line:setColor(period, instance.parameters.Up);
	else
	Line:setColor(period, instance.parameters.Down);	
	end
	
end