import type { HighLow } from '../../base/Candle.type.js';
import { IndicatorSeries } from '../../base/Indicator.js';
export declare class MassIndex extends IndicatorSeries<HighLow> {
    #private;
    readonly interval: number;
    constructor(interval?: number);
    getRequiredInputs(): number;
    update(candle: HighLow, replace: boolean): number | null;
}