Вызов RSI

val_Up[I] = (val_Up[I-1] * (P-1) + Up[I]) / P

DataSource("TQBR","RASP",INTERVAL_M5)   
local num_candles=ds:Size()             
func=RSI()
local a=func(num_candles, {Period=12, VType="Typical", round=7}, ds)

Settings = {
Name = "*RSI (Relative Strength Index)", 
round = "off",
Period = 14, 
VType = "Close", --Open, High, Low, Close, Volume, Median, Typical, Weighted, Difference
line = {{
        Name = "RSI",
        Type = TYPE_LINE, 
        Color = RGB(255, 0, 0)
        }
        }
}

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

function OnCalculate(Index) 
    return func(Index, Settings)
end

function RSI() --Relative Strength I("RSI")
    local Up = {}
    local Down = {}
    local val_Up = {}
    local val_Down = {}
return function (I, Fsettings, ds)
local Out = nil
local Fsettings=(Fsettings or {})
local P = (Fsettings.Period or 14)
local VT = (Fsettings.VType or "Close")
local R = (Fsettings.round or "off")
if I == 1 then
    Up[I] = 0
    Down[I] = 0
end
if I>1 then
    local Val = Value(I,VT,ds)
    local ValPrev = Value(I-1,VT,ds)
    if ValPrev < Val then
        Up[I] = Val - ValPrev
    else
        Up[I] = 0
    end
    if ValPrev > Val then
        Down[I] = ValPrev - Val
    else
        Down[I] = 0
    end
    if (I == P) or (I == P+1) then
        local sumU = 0
        local sumD = 0
        for i = I-P+1, I do
            sumU = sumU + Up[i]
            sumD = sumD + Down[i]
        end
        val_Up[I] = sumU/P
        val_Down[I] = sumD/P
    end
    if I > P+1 then
        val_Up[I] = (val_Up[I-1] * (P-1) + Up[I]) / P
        val_Down[I] = (val_Down[I-1] * (P-1) + Down[I]) / P
    end
    if I >= P then
        Out = 100 / (1 + (val_Down[I] / val_Up[I]))
        return rounding(Out, R)
    end
end
end
end

function rounding(num, round) 
if round and string.upper(round)== "ON" then round=0 end
if num and tonumber(round) then
    local mult = 10^round
    if num >= 0 then return math.floor(num * mult + 0.5) / mult
    else return math.ceil(num * mult - 0.5) / mult end
else return num end
end

function Value(I,VType,ds) 
local Out = nil
VType=(VType and string.upper(string.sub(VType,1,1))) or "A"
    if VType == "O" then        --Open
        Out = (O and O(I)) or (ds and ds:O(I))
    elseif VType == "H" then     --High
        Out = (H and H(I)) or (ds and ds:H(I))
    elseif VType == "L" then    --Low
        Out = (L and L(I)) or (ds and ds:L(I))
    elseif VType == "C" then    --Close
        Out = (C and C(I)) or (ds and ds:C(I))
    elseif VType == "V" then    --Volume
        Out = (V and V(I)) or (ds and ds:V(I)) 
    elseif VType == "M" then    --Median
        Out = ((Value(I,"H",ds) + Value(I,"L",ds)) / 2)
    elseif VType == "T" then    --Typical
        Out = ((Value(I,"M",ds) * 2 + Value(I,"C",ds))/3)
    elseif VType == "W" then    --Weighted
        Out = ((Value(I,"T",ds) * 3 + Value(I,"O",ds))/4) 
    elseif VType == "D" then    --Difference
        Out = (Value(I,"H",ds) - Value(I,"L",ds))
    elseif VType == "A" then    --Any
        if ds then Out = ds[I] else Out = nil end
    end
return Out
end