翻译脚本v3到v4错误--widest()只适用于相互嵌套的作用域。

Question

我试图用tradingview函数翻译一个好的公共RSI脚本，从v3到v4，但翻译器给我一个错误。

看起来像是关于局部变量的问题，并不难解决，但我不能。

    //@version=3
study("RSI Shaded - MTF", "RSI MTF", overlay = false)

intval = input("H01", "Interval", options=["M01", "M03", "M05", "M15", "M30", "M45", "H01", "H02", "H03", "H04", "H08", "H12", "Day", "Week", "Month", "Year"])
useChartIntval = input(true, "Use Chart Interval")

length = input(2, title = "Length", minval = 1)
cLength = input(3, title = "Cumulative Length", minval = 1)
emaLength = input(5, title = "EMA of RSI Length", minval = 1, defval = 5)

ob = input(85, title="Over Bought") 
os = input(15, title="Over Sold")
showCum = input(true, title = "Show Cumulative RSI?")
histBased = input(false, title = "Histogram Style?")
cBars = input(false, title = "Color Extreme Bars?")
showDiv = input(true, title = "Show Divergences?")

int = iff(intval == "M01", "1", iff(intval == "M03", "3", iff(intval == "M05", "5", iff(intval == "M15", "15", iff(intval == "M30", "30", iff(intval == "M45", "45", iff(intval == "H01", "60", iff(intval == "H02", "120", iff(intval == "H03", "180", iff(intval == "H04", "240", iff(intval == "H08", "480", iff(intval == "H12", "720", iff(intval == "Day", "D", iff(intval == "Week", "W", iff(intval == "Month", "M", iff(intval == "Year", "12M", "60"))))))))))))))))

bar = -1
bar := nz(bar[1]) + 1

start = security(tickerid, int, time, lookahead = true)
newSession = iff(change(start), 1, 0)

barsInInterval() =>
    sinceNewSession = 0
    offset = useChartIntval ? 0 : barssince(newSession)
    sinceNewSession := na(sinceNewSession[1]) or offset > nz(sinceNewSession[1]) ? offset : nz(sinceNewSession[1])

barsInInt = barsInInterval()
isChartIntVal = useChartIntval or barsInInt == 0

src = close

getRSI() =>
    srcPrev = src
    srcPrev := newSession or isChartIntVal ? src[1] : nz(srcPrev[1])

    gain = max(src - srcPrev, 0)
    loss = max(srcPrev - src, 0)

    ag = 50.0
    al = 50.0

    agPrev = 50.0
    agPrev := newSession or isChartIntVal ? nz(ag[1]) : nz(agPrev[1]) 

    alPrev = 50.0
    alPrev := newSession or isChartIntVal ? nz(al[1]) : nz(alPrev[1])

    // MMA formula for Average Gain & Average Loss
    ag := (agPrev * (length - 1) + gain) / length
    al := (alPrev * (length - 1) + loss) / length

    rsi1 = 100 - 100 / (1 + ag / al)

    rsi = if showCum
        rsi = if not isChartIntVal and cLength > 1
            rsi = if bar > 0 and bar > barsInInt + 1
                step = (barsInInt + 1)
                start = min(bar, barssince(newSession))
                end = max(0, min(bar - 1, start + step * (cLength - 2)))
                sum = rsi1

                for i = start to end by step
                    sum := sum + rsi1[i + 1]

                rsi = sum / cLength
            else
                rsi1
        else
            rsi = sma(rsi1, cLength)
    else
        rsi1

    a = 2 / (emaLength + 1)
    ema = close

    emaPrev = close
    emaPrev := newSession or isChartIntVal ? nz(ema[1]) : nz(emaPrev[1])

    ema := emaPrev + a * (rsi - emaPrev)

    [rsi, ema]

[rsi, ema] = getRSI()

// Plots

hline(ob, title = "Over Bought", linestyle = solid, color = #4444B0CC)
hline(os, title = "Over Sold", linestyle = solid, color = #4444B0CC)
hline(50, title = "Mid", linestyle = dashed, color = #666666CC)

color1 = rsi < os or rsi[1] < os ? #33FF33FF : rsi > ob or rsi[1] > ob ? #FF3333FF : #FFFFFFFF
color2 = rsi < os ? #33FF33FF : rsi > ob ? #FF3333FF : #88888855

p1 = plot(not histBased ? rsi : na, title = "RSI", histbase = 50, color = color1)
p2 = plot(histBased ? rsi : na, title = "RSI Histogram", histbase = 50, style = histogram, linewidth = 3, color = color2) 

rsiClamp = plot(max(os, min(ob, rsi)), title = "RSI Clamped (Not Used)", color = #00000000, editable = false)

fill(p1, rsiClamp, title = "OS/OB Fill", color = rsi < 50 ? #00FF00FF : #FF0000FF)

e = plot(ema, title = "EMA", color = rsi > ema ? #00A2FFFF : #FF00FFFF)

fill(p1, e, title = "RSI - EMA fill", color = rsi > ema ? #00C2FF20 : #FF00FF20)

barcolor(title = "Bar Color", color = cBars ? (rsi < os ? #33FF33FF : rsi > ob ? #FF3333FF : #00000000) : na)

//end[enter image description here][1]

这是来自@mortdiggiddy的原始脚本。https:/www.tradingview.comscriptHINc7bmi-RSI-Shaded-MTF

欢迎任何帮助请在此输入图片描述