RSI OB/OS [trugurpala]

//@version=6
// RSI OB/OS with Gradient Color — github.com/trugurpala/pinescriptv6
// Author: Ugur Pala · mail@ugurpala.com
indicator("RSI OB/OS [trugurpala]", overlay=false)

// ── Inputs ───────────────────────────────────────────────────────────────────
int   rsiLen  = input.int(14, "RSI Length", minval=1)
float obLevel = input.float(70, "Overbought", minval=50, maxval=100)
float osLevel = input.float(30, "Oversold",   minval=0,  maxval=50)

// ── Calculations ─────────────────────────────────────────────────────────────
float rsi       = ta.rsi(close, rsiLen)
bool  crossObDn = ta.crossunder(rsi, obLevel)
bool  crossOsUp = ta.crossover(rsi,  osLevel)

// ── Gradient ─────────────────────────────────────────────────────────────────
color bullColor = color.from_gradient(rsi, 50, obLevel, color.new(color.aqua, 40), color.new(color.green, 0))
color bearColor = color.from_gradient(rsi, osLevel, 50, color.new(color.red, 0),   color.new(color.orange, 40))
color rsiColor  = rsi >= 50 ? bullColor : bearColor

// ── Visuals ──────────────────────────────────────────────────────────────────
plot(rsi, "RSI", rsiColor, linewidth=2)
hline(obLevel, "OB",  color.new(color.red,   30), hline.style_dashed)
hline(50,      "Mid", color.new(color.gray,  50), hline.style_dotted)
hline(osLevel, "OS",  color.new(color.green, 30), hline.style_dashed)
bgcolor(rsi >= obLevel ? color.new(color.red,   92) : na)
bgcolor(rsi <= osLevel ? color.new(color.green, 92) : na)
plotshape(crossObDn, "Exit OB", shape.circle, location.absolute, color.red,   size=size.tiny)
plotshape(crossOsUp, "Exit OS", shape.circle, location.absolute, color.green, size=size.tiny)

// ── Alerts ───────────────────────────────────────────────────────────────────
alertcondition(crossObDn, "RSI Exit OB", "RSI OB exit — {{ticker}}")
alertcondition(crossOsUp, "RSI Exit OS", "RSI OS exit — {{ticker}}")