import { DataComponent as DC } from '../runtime';
import { EMADataTransform } from '../spec';
export declare function ema(values: number[], alpha: number): number[];
export type EMAOptions = Omit<EMADataTransform, 'type'>;
/**
 * https://en.wikipedia.org/wiki/Exponential_smoothing
 * @param options
 * @returns
 */
export declare const EMA: DC<EMAOptions>;