export interface IStockPrice {
    ticker: string;
    price: number;
    currency: string;
    change: number;
    changePercent: number;
    previousClose: number;
    timestamp: Date;
    provider: string;
    marketState: 'PRE' | 'REGULAR' | 'POST' | 'CLOSED';
    exchange?: string;
    exchangeName?: string;
}