RSI Divergence [Ahmed Edition]

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Ahmed - Quant-Edge Indicators
//@version=6
indicator("RSI Divergence [Ahmed Edition]", shorttitle="RSI Div A", overlay=false, max_labels_count=500)

// ================== INPUTS ==================
len     = input.int(14, minval=1, title="RSI Length")
ob      = input.int(70, title="Overbought", minval=0, maxval=100)
os      = input.int(30, title="Oversold", minval=0, maxval=100)
omid    = input.int(50, title="Midline Value", minval=0, maxval=100)
hideMid = input.bool(false, title="Hide Midline")

lookback = input.int(90, title="Lookback Period (bars)", minval=1)
showPiv  = input.bool(true, title="Show Pivots?")
shortLbl = input.bool(false, title="Short Labels?")
hideLbls = input.bool(false, title="Hide Labels & Use Background")

// ================== RSI ==================
rsi = ta.rsi(close, len)

// Levels
hOB   = hline(ob, "Overbought", color=color.red)
hOS   = hline(os, "Oversold", color=color.green)
hMid  = hline(omid, "Midline", color=color.new(color.gray, hideMid ? 100 : 70))

plot(rsi, color=(rsi > ob or rsi < os) ? color.red : color.black)
fill(hMid, hOB, color=color.new(color.lime, 92))
fill(hOS, hMid, color=color.new(color.red, 92))

// ================== PIVOTS ==================
highestBar = ta.highestbars(rsi, lookback)
lowestBar  = ta.lowestbars(rsi, lookback)

var float maxClose = na
var float maxRSI   = na
var float minClose = na
var float minRSI   = na

// Update max/min
if highestBar == 0
    maxClose := close
    maxRSI   := rsi
else
    maxClose := nz(maxClose[1], close)
    maxRSI   := nz(maxRSI[1], rsi)

if lowestBar == 0
    minClose := close
    minRSI   := rsi
else
    minClose := nz(minClose[1], close)
    minRSI   := nz(minRSI[1], rsi)

// Pivot conditions
pivHigh = (maxRSI == maxRSI[2] and maxRSI[2] != maxRSI[3])
pivLow  = (minRSI == minRSI[2] and minRSI[2] != minRSI[3])

// ================== DIVERGENCES ==================
bearDiv = close[1] > close[2] and rsi[1] < maxRSI and rsi <= rsi[1]
bullDiv = close[1] < close[2] and rsi[1] > minRSI and rsi >= rsi[1]

// ================== ALERTS ==================
alertcondition(bearDiv, title="Bearish Divergence", message="Bear Div")
alertcondition(bullDiv, title="Bullish Divergence", message="Bull Div")
alertcondition(pivHigh, title="Pivot High", message="Pivot High")
alertcondition(pivLow, title="Pivot Low", message="Pivot Low")

// Extra Alerts (Enter/Exit)
bearExit  = ta.crossunder(rsi, os)   // RSI drops below oversold
bullExit  = ta.crossover(rsi, ob)    // RSI breaks above overbought
bearEnter = ta.crossunder(rsi, ob)   // RSI falls below OB
bullEnter = ta.crossover(rsi, os)    // RSI rises above OS

alertcondition(bearExit,  title="Bear Exit",  message="Bear Exit")
alertcondition(bullExit,  title="Bull Exit",  message="Bull Exit")
alertcondition(bearEnter, title="Bear Enter", message="Bear Enter")
alertcondition(bullEnter, title="Bull Enter", message="Bull Enter")

// ================== LABELS ==================
if bearDiv and not hideLbls
    label.new(bar_index - 1, rsi[1] + 1,
        shortLbl ? "▼" : "BEAR",
        color=color.red, textcolor=color.white,
        style=label.style_label_down, yloc=yloc.price, size=size.small)

if bullDiv and not hideLbls
    label.new(bar_index - 1, rsi[1] - 1,
        shortLbl ? "▲" : "BULL",
        color=color.green, textcolor=color.white,
        style=label.style_label_up, yloc=yloc.price, size=size.small)

if showPiv and pivHigh and not hideLbls
    label.new(bar_index - 2, maxRSI + 1,
        shortLbl ? "P" : "PIVOT",
        color=color.blue, textcolor=color.white,
        style=label.style_label_down, yloc=yloc.price, size=size.tiny)

if showPiv and pivLow and not hideLbls
    label.new(bar_index - 2, minRSI - 1,
        shortLbl ? "P" : "PIVOT",
        color=color.blue, textcolor=color.white,
        style=label.style_label_up, yloc=yloc.price, size=size.tiny)

// ================== BACKGROUND COLORING ==================
bgcolor(
     hideLbls ?
     bearDiv ? color.new(color.red, 85) :
     bullDiv ? color.new(color.green, 85) :
     (showPiv and (pivHigh or pivLow) ? color.new(color.blue, 85) : na)
     : na, transp=90
)