My RSI

ma(source, length, type) =>

    switch type

        "SMA" => ta.sma(source, length)

        "Bollinger Bands" => ta.sma(source, length)

        "EMA" => ta.ema(source, length)

        "SMMA (RMA)" => ta.rma(source, length)

        "WMA" => ta.wma(source, length)

        "VWMA" => ta.vwma(source, length)

rsiLengthInput = input.int(14, minval=1, title="RSI Length", group="RSI Settings")

rsiSourceInput = input.source(close, "Source", group="RSI Settings")

maTypeInput = input.string("SMA", title="MA Type", options=["SMA", "Bollinger Bands", "EMA", "SMMA (RMA)", "WMA", "VWMA"], group="MA Settings", display = display.data_window)

maLengthInput = input.int(14, title="MA Length", group="MA Settings", display = display.data_window)

bbMultInput = input.float(2.0, minval=0.001, maxval=50, title="BB StdDev", group="MA Settings", display = display.data_window)

showDivergence = input.bool(false, title="Show Divergence", group="RSI Settings", display = display.data_window)

up = ta.rma(math.max(ta.change(rsiSourceInput), 0), rsiLengthInput)

down = ta.rma(-math.min(ta.change(rsiSourceInput), 0), rsiLengthInput)

rsi = down == 0 ? 100 : up == 0 ? 0 : 100 - (100 / (1 + up / down))

rsiMA = ma(rsi, maLengthInput, maTypeInput)

isBB = maTypeInput == "Bollinger Bands"

rsiPlot = plot(rsi, "RSI", color=#7E57C2)

plot(rsiMA, "RSI-based MA", color=color.yellow)

rsiUpperBand = hline(70, "RSI Upper Band", color=#787B86)

midline = hline(50, "RSI Middle Band", color=color.new(#787B86, 50))

rsiLowerBand = hline(30, "RSI Lower Band", color=#787B86)

fill(rsiUpperBand, rsiLowerBand, color=color.rgb(126, 87, 194, 90), title="RSI Background Fill")

bbUpperBand = plot(isBB ? rsiMA + ta.stdev(rsi, maLengthInput) * bbMultInput : na, title = "Upper Bollinger Band", color=color.green)

bbLowerBand = plot(isBB ? rsiMA - ta.stdev(rsi, maLengthInput) * bbMultInput : na, title = "Lower Bollinger Band", color=color.green)

fill(bbUpperBand, bbLowerBand, color= isBB ? color.new(color.green, 90) : na, title="Bollinger Bands Background Fill")

midLinePlot = plot(50, color = na, editable = false, display = display.none)

fill(rsiPlot, midLinePlot, 100, 70, top_color = color.new(color.green, 0), bottom_color = color.new(color.green, 100),  title = "Overbought Gradient Fill")

fill(rsiPlot, midLinePlot, 30,  0,  top_color = color.new(color.red, 100), bottom_color = color.new(color.red, 0),      title = "Oversold Gradient Fill")

// Divergence

lookbackRight = 5

lookbackLeft = 5

rangeUpper = 60

rangeLower = 5

bearColor = color.red

bullColor = color.green

textColor = color.white

noneColor = color.new(color.white, 100)

plFound = na(ta.pivotlow(rsi, lookbackLeft, lookbackRight)) ? false : true

phFound = na(ta.pivothigh(rsi, lookbackLeft, lookbackRight)) ? false : true

_inRange(cond) =>

    bars = ta.barssince(cond == true)

    rangeLower <= bars and bars <= rangeUpper

//------------------------------------------------------------------------------

// Regular Bullish

// rsi: Higher Low

rsiHL = rsi[lookbackRight] > ta.valuewhen(plFound, rsi[lookbackRight], 1) and _inRange(plFound[1])

// Price: Lower Low

priceLL = low[lookbackRight] < ta.valuewhen(plFound, low[lookbackRight], 1)

bullCondAlert = priceLL and rsiHL and plFound

bullCond = showDivergence and bullCondAlert

plot(

     plFound ? rsi[lookbackRight] : na,

     offset=-lookbackRight,

     title="Regular Bullish",

     linewidth=2,

     color=(bullCond ? bullColor : noneColor),

     display = display.pane

     )

plotshape(

     bullCond ? rsi[lookbackRight] : na,

     offset=-lookbackRight,

     title="Regular Bullish Label",

     text=" Bull ",

     style=shape.labelup,

     location=location.absolute,

     color=bullColor,

     textcolor=textColor

     )

//------------------------------------------------------------------------------

// Regular Bearish

// rsi: Lower High

rsiLH = rsi[lookbackRight] < ta.valuewhen(phFound, rsi[lookbackRight], 1) and _inRange(phFound[1])

// Price: Higher High

priceHH = high[lookbackRight] > ta.valuewhen(phFound, high[lookbackRight], 1)

bearCondAlert = priceHH and rsiLH and phFound

bearCond = showDivergence and bearCondAlert

plot(

     phFound ? rsi[lookbackRight] : na,

     offset=-lookbackRight,

     title="Regular Bearish",

     linewidth=2,

     color=(bearCond ? bearColor : noneColor),

     display = display.pane

     )

plotshape(

     bearCond ? rsi[lookbackRight] : na,

     offset=-lookbackRight,

     title="Regular Bearish Label",

     text=" Bear ",

     style=shape.labeldown,

     location=location.absolute,

     color=bearColor,

     textcolor=textColor

     )

alertcondition(bullCondAlert, title='Regular Bullish Divergence', message="Found a new Regular Bullish Divergence, `Pivot Lookback Right` number of bars to the left of the current bar.")

alertcondition(bearCondAlert, title='Regular Bearish Divergence', message='Found a new Regular Bearish Divergence, `Pivot Lookback Right` number of bars to the left of the current bar.')