import { Candle } from '../types';
/**
 * Computes Relative Volume (RVOL) for every candle in the series.
 *
 * RVOL[i] = candles[i].volume / mean(candles[i-period … i-1].volume)
 *
 * The lookback is exclusive of the current candle — it answers "how does this
 * bar's volume compare to the N bars that preceded it?"
 *
 * - Index 0 (no prior context) → 1.0 (neutral).
 * - When fewer than `period` prior candles exist, the average is taken over all
 *   available prior candles (same graceful fallback as `atr`).
 *
 * @param candles - Array of Candle objects with a defined `volume` field.
 * @param period  - Number of prior candles to average (default: DEFAULT_RVOL_PERIOD).
 * @returns Array of RVOL values, one per candle, in the same order.
 */
export declare function rvol(candles: Candle[], period?: number): number[];