/**
 * Utility functions for indicator calculations
 */
import type { OHLCV } from "../types/index.js";
/**
 * Extract close prices from OHLCV data
 */
export declare function getClosePrices(data: OHLCV[]): number[];
/**
 * Extract high prices from OHLCV data
 */
export declare function getHighPrices(data: OHLCV[]): number[];
/**
 * Extract low prices from OHLCV data
 */
export declare function getLowPrices(data: OHLCV[]): number[];
/**
 * Extract volumes from OHLCV data
 */
export declare function getVolumes(data: OHLCV[]): number[];
/**
 * Calculate average of an array
 */
export declare function average(values: number[]): number;
/**
 * Calculate standard deviation
 */
export declare function standardDeviation(values: number[]): number;
/**
 * True Range calculation for ATR
 */
export declare function trueRange(data: OHLCV[]): number[];
/**
 * Detect crossover (fast crosses above slow)
 */
export declare function crossover(fast: number[], slow: number[]): boolean;
/**
 * Detect crossunder (fast crosses below slow)
 */
export declare function crossunder(fast: number[], slow: number[]): boolean;
/**
 * Calculate slope of values (recent trend)
 */
export declare function slope(values: number[], period?: number): number;
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