import { PSAR as PSARIndicator } from 'technicalindicators';
import { OHLC } from '../types';
import { Indicator, IndicatorInput } from './base-indicator';
export interface ParabolicStopAndReverseInput extends IndicatorInput {
    step?: number;
    max?: number;
}
/**
 * The parabolic SAR indicator, developed by J. Wells Wilder, is used
 * by traders to determine trend direction and potential reversals in price.
 * The indicator uses a trailing stop and reverse method called "SAR"
 * or stop and reverse, to identify suitable exit and entry points.
 * Traders also refer to the indicator as the parabolic stop and reverse,
 * parabolic SAR, or PSAR.
 * [Investopedia](https://www.investopedia.com/terms/p/parabolicindicator.asp)
 */
export declare class PSAR implements Indicator {
    indicator: PSARIndicator;
    step: number;
    max: number;
    /**
     * @param {OHLC[]} series candles series
     * @param {number} step step for calculation
     * @param {number} max max for calculation
     */
    constructor(series?: OHLC[], step?: number, max?: number);
    /**
     * Calculate PSAR for specified input
     * @param {ParabolicStopAndReverseInput} input PSAR input for calculation
     * @return {number[]} array representing PSAR values
     */
    static calculate(input: ParabolicStopAndReverseInput): number[];
    /**
     * Generate instance of PSAR indicator
     * @param {ParabolicStopAndReverseInput} input PSAR input for generation
     * @return {PSAR} instance of indicators
     */
    static generator({ max, step, series, }: ParabolicStopAndReverseInput): PSAR;
    /**
     * get values for PSAR instance data
     * @return {number[]} PSAR values
     */
    getResults(): number[];
    /**
     * Calc PSAR value for next candle
     * @param {OHLC} candle new candle
     * @return {number | undefined} next psar value or undefined if period is
     * greater than actual series length
     */
    next({ low, high }: OHLC): number | undefined;
}