import { IDataFrame } from 'data-forge';
/**
 * A record in the output bollinger bands dataframe.
 */
export interface IBollingerBand {
    /**
     * The value that the bollinger bands are derived from.
     */
    value: number;
    /**
     * Middle value in the bollinger band, the average value for the particular period.
     */
    middle: number;
    /***
     * The upper value. middle + (standard deviations x X).
     */
    upper: number;
    /***
     * The upper value. middle - (standard deviations x X).
     */
    lower: number;
}
declare module "data-forge/build/lib/series" {
    interface ISeries<IndexT, ValueT> {
        bollinger(period: number, stdDevMultUpper: number, stdDevMultLower: number): IDataFrame<any, IBollingerBand>;
    }
    interface Series<IndexT, ValueT> {
        bollinger(period: number, stdDevMultUpper: number, stdDevMultLower: number): IDataFrame<any, IBollingerBand>;
    }
}