export declare const calculateEma: (values: number[], period: number) => number | null;
export declare const calculateRsi: (values: number[], period: number) => number | null;
export declare const calculateAtr: (highs: number[], lows: number[], closes: number[], period: number) => number | null;
export declare const buildTechnicalSnapshot: ({ closes, highs, lows, }: {
    closes: number[];
    highs: number[];
    lows: number[];
}) => {
    lastClose: number | null;
    ema20: number | null;
    ema50: number | null;
    ema200: number | null;
    rsi14: number | null;
    atr14: number | null;
};