Все индикаторы на Lua

Settings = {
Name = "*BWMFI (Bill Williams Market Facilitation Index)", 
line = {{
      Name = "Horizontal line",
      Type = TYPE_LINE, 
      Color = RGB(140, 140, 140)
      },
      {
      Width = 3,
      Name = "BWMFI_Green", 
      Type = TYPE_HISTOGRAM, 
      Color = RGB(0, 206, 0)
      },
      {
      Width = 3,
      Name = "BWMFI_Fade", 
      Type = TYPE_HISTOGRAM, 
      Color = RGB(128, 64, 0)
      },
      {
      Width = 3,
      Name = "BWMFI_Fake", 
      Type = TYPE_HISTOGRAM, 
      Color = RGB(0, 255, 255)
      },
      {
      Width = 3,
      Name = "BWMFI_Squat", 
      Type = TYPE_HISTOGRAM, 
      Color = RGB(255, 0, 255)
      }
      },
Round = "off",
Multiply = 1,
Horizontal_line="0"
}

function Init()
   func = BWMFI()
   return #Settings.line
end

function OnCalculate(Index)
local Out = ConvertValue(Settings, func(Index, Settings))
local HL = tonumber(Settings.Horizontal_line)
   if Out then
      local prev = GetValue(Index-1, 2) or GetValue(Index-1, 3) or GetValue(Index-1, 4) or GetValue(Index-1, 5) or 0
      local prev_v = V(Index-1) or 0
      if (Out > prev) and (V(Index) > prev_v) then
         return HL,Out,nil,nil,nil
      elseif (Out <= prev) and (V(Index) <= prev_v) then
         return HL,nil,Out,nil,nil
      elseif (Out > prev) and (V(Index) <= prev_v) then
         return HL,nil,nil,Out,nil
      elseif (Out <= prev) and (V(Index) > prev_v) then
         return HL,nil,nil,nil,Out
      else
         return HL,nil,nil,nil,nil
      end
   else
      return HL,nil,nil,nil,nil
   end
end

function BWMFI() --Bill Williams Market Facilitation I ("BWMFI")
   local it = {p=0, l=0}
return function (I, Fsettings, ds)
   if I == 1 then
      it = {p=0, l=0}
   end
   if CandleExist(I,ds) then
      if I~=it.p then it={p=I, l=it.l+1} end
      return GetValueEX(it.p, DIFFERENCE, ds) / GetValueEX(it.p, VOLUME, ds)
   end
return nil
end
end


SMA,MMA,EMA,WMA,SMMA,VMA = "SMA","MMA","EMA","WMA","SMMA","VMA"
OPEN,HIGH,LOW,CLOSE,VOLUME,MEDIAN,TYPICAL,WEIGHTED,DIFFERENCE,ANY = "O","H","L","C","V","M","T","W","D","A"

function CandleExist(I,ds)
return (type(C)=="function" and C(I)~=nil) or
   (type(ds)=="table" and (ds[I]~=nil or (type(ds.Size)=="function" and (I>0) and (I<=ds:Size()))))
end

function Squeeze(I,P)
   return math.fmod(I-1,P+1)
end

function ConvertValue(T,...)
local function r(V, R) 
   if R and string.upper(R)== "ON" then R=0 end
   if V and tonumber(R) then
      if V >= 0 then return math.floor(V * 10^R + 0.5) / 10^R
      else return math.ceil(V * 10^R - 0.5) / 10^R end
   else return V end
end
   if arg.n > 0 then
      for i = 1, arg.n do
         arg[i]=arg[i] and r(arg[i] * ((T and T.Multiply) or 1), (T and T.Round) or "off")
      end
      return unpack(arg)
   else return nil end
end

function GetValueEX(I,VT,ds) 
VT=(VT and string.upper(string.sub(VT,1,1))) or ANY
   if VT == OPEN then         --Open
      return (O and O(I)) or (ds and ds:O(I))
   elseif VT == HIGH then       --High
      return (H and H(I)) or (ds and ds:H(I))
   elseif VT == LOW then      --Low
      return (L and L(I)) or (ds and ds:L(I))
   elseif VT == CLOSE then      --Close
      return (C and C(I)) or (ds and ds:C(I))
   elseif VT == VOLUME then      --Volume
      return (V and V(I)) or (ds and ds:V(I)) 
   elseif VT == MEDIAN then      --Median
      return ((GetValueEX(I,HIGH,ds) + GetValueEX(I,LOW,ds)) / 2)
   elseif VT == TYPICAL then   --Typical
      return ((GetValueEX(I,MEDIAN,ds) * 2 + GetValueEX(I,CLOSE,ds))/3)
   elseif VT == WEIGHTED then   --Weighted
      return ((GetValueEX(I,TYPICAL,ds) * 3 + GetValueEX(I,OPEN,ds))/4) 
   elseif VT == DIFFERENCE then   --Difference
      return (GetValueEX(I,HIGH,ds) - GetValueEX(I,LOW,ds))
   else                     --Any
      return (ds and ds[I])
   end
return nil
end