/**
 * Yahoo Finance data provider
 */
import type { OHLCV, Timeframe } from "../types/index.js";
import { BaseDataProvider } from "./provider.js";
export declare class YahooFinanceProvider extends BaseDataProvider {
    name: string;
    private baseUrl;
    fetchOHLCV(symbol: string, timeframe: Timeframe, limit?: number, targetDate?: Date): Promise<OHLCV[]>;
    isAvailable(): Promise<boolean>;
    /**
     * Convert our timeframe format to Yahoo Finance interval
     */
    private convertTimeframe;
    /**
     * Validate individual candle for data quality
     */
    private isValidCandle;
    /**
     * Calculate appropriate period range based on timeframe and limit
     * If targetDate is provided, calculate from that date instead of today
     */
    private calculatePeriod;
}
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