Индикатор объемы за период MAV

--[[
MA volumn
--]]
Settings=              
        {                          
            Name = "MAV",   -- indicator name
            per=10,               -- period			
            line=                                     
                {                               
                    {  
                        Name = "MA",
                        Type =TYPE_LINE,
                        Width = 1,
                        Color = RGB(0,0,0)
                    }		
                }
       }


function Init()
   
  mav = {}
  return 1
end


function OnCalculate(index)
  
  per = Settings.per
 
  if index > 1 then 
    mav[index] = mav[index-1] + V(index)
  else 
    mav[index] = V(index)  
  end   

  if index > per then
    vv = mav[index] - mav[index-per]
  else 
    vv = 0
  end  

  return vv

end