import Window, { WindowArgs } from "../Window";
import { JSONDef, Indicator, Close } from "../types";
export interface ERArgs {
    period: number;
    count: number;
    window: WindowArgs<number>;
}
export default class ER extends Indicator<ERArgs> {
    period: number;
    count: number;
    window: Window<number>;
    constructor(period?: number, count?: number, window?: Window<number>);
    next(value: number): number;
    nextBar(bar: Close): number;
    reset(): void;
    toString(): string;
    toJSON(): JSONDef<ERArgs>;
    static readonly key = "finance.tr.ER";
    static minBars({ period }: ERArgs): number;
    static display({ period }: ERArgs, value?: string): string;
    static from({ period, count, window }: ERArgs): ER;
}