import { TrendIndicatorSeries } from '../../base/Indicator.js';
export declare class TDS extends TrendIndicatorSeries {
    private readonly closes;
    private setupCount;
    private setupDirection;
    getRequiredInputs(): number;
    update(close: number, replace: boolean): number | null;
    protected calculateSignalState(result?: number | null | undefined): "BEARISH" | "BULLISH" | "UNKNOWN";
}