import type { BollingerBands } from '../BBANDS/BollingerBands.js';
import { IndicatorSeries } from '../../base/Indicator.js';
export declare class BollingerBandsWidth extends IndicatorSeries {
    readonly bollingerBands: BollingerBands;
    constructor(bollingerBands: BollingerBands);
    getRequiredInputs(): number;
    update(price: number, replace: boolean): number | null;
}