import { RSI as RSIIndicator } from 'technicalindicators';
import { OHLC, OHLCEnum } from '../types';
import { IndicatorInput, Indicator } from './base-indicator';
export interface RelativeStrengthIndexInput extends IndicatorInput {
    period?: number;
    source?: OHLCEnum;
}
/**
 * The relative strength index (RSI) is a momentum indicator used in technical
 * analysis that measures the magnitude of recent price changes to evaluate
 * overbought or oversold conditions in the price of a stock or other asset.
 * The RSI is displayed as an oscillator (a line graph that moves between two
 * extremes) and can have a reading from 0 to 100. The indicator was originally
 * developed by J. Welles Wilder Jr. and introduced in his seminal 1978 book,
 * "New Concepts in Technical Trading Systems". Traditional interpretation and
 * usage of the RSI are that values of 70 or above indicate that a security is
 * becoming overbought or overvalued and may be primed for a trend reversal or
 * corrective pullback in price. An RSI reading of 30 or below indicates an
 * oversold or undervalued condition.
 */
export declare class RSI implements Indicator {
    indicator: RSIIndicator;
    source: OHLCEnum;
    /**
     * @param {OHLC[]} series candles series
     * @param {OHLCEnum} source source of values
     * @param {number} period period for indicator
     */
    constructor(series: OHLC[], source?: OHLCEnum, period?: number);
    /**
     * Retrieve RSI values for instance
     * @return {number[]} values for instance data
     */
    getResults(): number[];
    /**
     * Calculate RSI to next tick
     * @param {OHLC} candle new candle to add to series
     * @return {number | undefined} next RSI value or undefined if period is
     * greater than actual series length
     */
    next(candle: OHLC): number | undefined;
    /**
     * Create instance from data
     * @param {RelativeStrengthIndexInput} input input data
     * @return {RSI} RSI instance
     */
    static generator({ series, source, period, }: RelativeStrengthIndexInput): RSI;
    /**
     * Get RSI values from input
     * @param {RelativeStrengthIndexInput} input input data
     * @return {number[]} RSI values
     */
    static calculate(input: RelativeStrengthIndexInput): number[];
}