import type { HighLow } from '../../base/Candle.type.js';
import { IndicatorSeries } from '../../base/Indicator.js';
export type PSARConfig = {
    accelerationStep: number;
    accelerationMax: number;
};
export declare class PSAR extends IndicatorSeries<HighLow<number>> {
    private readonly accelerationStep;
    private readonly accelerationMax;
    private acceleration;
    private extreme;
    private lastSar;
    private isLong;
    private previousCandle;
    private prePreviousCandle;
    constructor(config: PSARConfig);
    get isStable(): boolean;
    getRequiredInputs(): number;
    update(candle: HighLow<number>, replace: boolean): number | null;
    getResultOrThrow(): number;
}