import { TrendIndicatorSeries } from '../../base/Indicator.js';
export declare class VROC extends TrendIndicatorSeries {
    #private;
    readonly interval: number;
    constructor(interval: number);
    getRequiredInputs(): number;
    update(volume: number, replace: boolean): number | null;
    protected calculateSignalState(result: number | null | undefined): "BEARISH" | "BULLISH" | "SIDEWAYS" | "UNKNOWN";
}