Почему не работает индикатор?

Settings=
   {
      Name = "Channel",
      period=5,
      line=
         {
            {
               Name = "High",
               Type =TYPE_LINE,
               Width = 1,
               Color = RGB(120,90, 140)
            },
            {
               Name = "Low",
               Type =TYPE_LINE,
               Width = 1,
               Color = RGB(120,90,140)
            }
            {
               Name = "Close",
               Type =TYPE_LINE,
               Width = 1,
               Color = RGB(120,90, 140)
            },
            {
               Name = "Open",
               Type =TYPE_LINE,
               Width = 1,
               Color = RGB(120,90,140)
            }
         }
   }



function Init()
   return 2
end




function OnCalculate(index)
   local high=0
   local low=0
        local clos=0
   local open=0
   
   Period = math.floor(Settings.period)
   
   if index<=Period then
      high=H(index)
      low=L(index)
      clos=C(index)
      open=O(index)
      for i=index , 1 , -1 do
         if H(i)>high then high=H(i) end
         if low>L(i) then low=L(i) end
      end
   else
      high=H(index)
      low=L(index)
      clos=C(index)
      open=O(index)
      for i=index , (index+1)-Period , -1 do
         if H(i)>high then high=H(i) end
         if low>L(i) then low=L(i) end
      end
   end
      
   return high , low, clos, open
end