// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0
// https://mozilla.org/MPL/2.0/
// © QuanTAlib

//@version=6
indicator("RWMA: Range Weighted Moving Average", shorttitle="RWMA", overlay=true)

// @function Calculates the Range Weighted Moving Average.
//   Each bar's contribution is weighted by its range (high - low),
//   giving more influence to volatile bars and less to narrow-range bars.
//   RWMA = Σ(close[i] × range[i]) / Σ(range[i]) over the lookback period.
// @param src Series to smooth (typically close).
// @param high_src High price series.
// @param low_src Low price series.
// @param period Lookback window length. Must be > 0.
// @returns The range-weighted moving average value.
rwma(series float src, series float high_src, series float low_src, simple int period) =>
    float sumWV = 0.0
    float sumW  = 0.0
    for i = 0 to period - 1
        float rng = high_src[i] - low_src[i]
        float w   = math.max(rng, 0.0)
        sumWV += src[i] * w
        sumW  += w
    sumW > 0.0 ? sumWV / sumW : src

// ── Inputs ──────────────────────────────────────────────
p = input.int(14, "Period", minval=1)

// ── Calculation ─────────────────────────────────────────
result = rwma(close, high, low, p)

// ── Plot ────────────────────────────────────────────────
plot(result, "RWMA", color=color.yellow, linewidth=2)