/**
 * Source for the price of a related entity, e.g. price of the underlying instrument in an Underlying Price Contingency (UPC) order. Can be used together with RelatedHighPrice (1819) and/or RelatedLowPrice (1820).
 * - Tag: 1821
 * - FIX Specification type: int
 * - Mapped type: number
 * @readonly
 * @public
 */
export declare const RelatedPriceSource: Readonly<{
    /** NBB (National Best Bid) */
    readonly NBBid: 1;
    /** NBO (National Best Offer) */
    readonly NBOffer: 2;
}>;
export type RelatedPriceSource = (typeof RelatedPriceSource)[keyof typeof RelatedPriceSource];