@thuantan2060/technicalindicators/lib/candlestick/HangingManUnconfirmed.js

Techincal Indicators written in javascript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = exports.DEFAULT_HANGING_MAN_UNCONFIRMED_CONFIG = void 0;
exports.hangingmanunconfirmed = hangingmanunconfirmed;
var _HangingMan = _interopRequireWildcard(require("./HangingMan"));
var _BearishHammerStick = require("./BearishHammerStick");
var _BullishHammerStick = require("./BullishHammerStick");
var _AverageGain = require("../Utils/AverageGain");
var _AverageLoss = require("../Utils/AverageLoss");
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function (e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (const t in e) "default" !== t && {}.hasOwnProperty.call(e, t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, t)) && (i.get || i.set) ? o(f, t, i) : f[t] = e[t]); return f; })(e, t); }
/**
 * Configuration interface for HangingManUnconfirmed pattern.
 * Extends HangingMan configuration.
 */

/**
 * Default configuration for HangingManUnconfirmed pattern.
 */
const DEFAULT_HANGING_MAN_UNCONFIRMED_CONFIG = exports.DEFAULT_HANGING_MAN_UNCONFIRMED_CONFIG = {
  ..._HangingMan.DEFAULT_HANGING_MAN_CONFIG,
  ..._BullishHammerStick.DEFAULT_BULLISH_HAMMER_CONFIG,
  ..._BearishHammerStick.DEFAULT_BEARISH_HAMMER_STICK_CONFIG
};
class HangingManUnconfirmed extends _HangingMan.default {
  config;
  constructor(config) {
    const finalConfig = {
      ...DEFAULT_HANGING_MAN_UNCONFIRMED_CONFIG,
      ...config
    };
    super(finalConfig);
    this.name = 'HangingManUnconfirmed';
    this.requiredCount = 4; // Reduced from 5 since no confirmation needed
    this.config = finalConfig;
  }
  logic(data) {
    // Validate data integrity first
    for (let i = 0; i < data.close.length; i++) {
      if (!this.validateOHLC(data.open[i], data.high[i], data.low[i], data.close[i])) {
        return false;
      }
    }

    // Check for upward trend and hammer pattern without confirmation
    let isPattern = this.upwardTrend(data, false);
    isPattern = isPattern && this.includesHammer(data, false);
    return isPattern;
  }
  upwardTrend(data, confirm = false) {
    // For unconfirmed pattern, we need an uptrend in the first 3 candles (indices 0-2)
    // The 4th candle (index 3) is the potential hanging man

    // Ensure we have enough data
    if (data.close.length < 4) {
      return false;
    }

    // Analyze trends in closing prices of the first three candlesticks (indices 0-2)
    let trendData = data.close.slice(0, 3);

    // Check for overall upward movement
    let firstClose = trendData[0];
    let lastClose = trendData[trendData.length - 1];

    // Must have overall upward movement
    if (lastClose <= firstClose) {
      return false;
    }

    // Calculate gains and losses for trend analysis
    let gains = (0, _AverageGain.averagegain)({
      values: trendData,
      period: trendData.length - 1
    });
    let losses = (0, _AverageLoss.averageloss)({
      values: trendData,
      period: trendData.length - 1
    });

    // Get the latest values from the arrays
    let latestGain = gains.length > 0 ? gains[gains.length - 1] : 0;
    let latestLoss = losses.length > 0 ? losses[losses.length - 1] : 0;

    // Additional validation: ensure there's meaningful price movement
    let priceRange = Math.max(...trendData) - Math.min(...trendData);
    let totalMovement = Math.abs(lastClose - firstClose);
    // Use direct calculation instead of removed utility function
    let minMovement = Math.max(priceRange * 0.01, 0.001 * 10); // Replaces: this.getAbsoluteMinimum() * 10

    // Upward trend: more gains than losses, and significant upward movement
    return latestGain > latestLoss && totalMovement >= minMovement;
  }
  includesHammer(data, confirm = false) {
    // For unconfirmed pattern, check the last candle (index 3) for hammer pattern
    let hammerIndex = 3;

    // Ensure we have the required data
    if (data.close.length < 4) {
      return false;
    }

    // Create data for just the potential hammer candle
    let hammerData = {
      open: [data.open[hammerIndex]],
      close: [data.close[hammerIndex]],
      low: [data.low[hammerIndex]],
      high: [data.high[hammerIndex]]
    };

    // Use the updated hammer functions with config objects
    let isBearishHammer = (0, _BearishHammerStick.bearishhammerstick)(hammerData, this.config);
    let isBullishHammer = (0, _BullishHammerStick.bullishhammerstick)(hammerData, this.config);

    // Also check using our custom hammer-like detection for more flexibility
    let isCustomHammer = this.isCustomHammerLike(data.open[hammerIndex], data.high[hammerIndex], data.low[hammerIndex], data.close[hammerIndex]);
    return isBearishHammer || isBullishHammer || isCustomHammer;
  }

  // Custom hammer-like detection that's very lenient for hanging man pattern
  isCustomHammerLike(open, high, low, close) {
    // Basic OHLC validation
    if (!this.validateOHLC(open, high, low, close)) {
      return false;
    }
    let bodySize = Math.abs(close - open);
    let lowerShadow = Math.min(open, close) - low;
    let upperShadow = high - Math.max(open, close);
    let totalRange = high - low;

    // Ensure we have a meaningful range
    if (totalRange <= 0) {
      return false;
    }

    // Simplified approach focusing on key characteristics
    let score = 0;

    // Primary criteria: Either shadow should be meaningful
    if (lowerShadow >= totalRange * 0.08 || upperShadow >= totalRange * 0.08) {
      score += 2; // Base points for having shadows
    }

    // Bonus for traditional hammer (shadow >= body)
    if (lowerShadow >= bodySize || upperShadow >= bodySize) {
      score += 3; // Strong bonus for classic hammer shape
    }

    // Bonus for reasonable body size
    if (bodySize <= totalRange * 0.70) {
      score += 1;
    }

    // Bonus for small body (doji-like patterns)
    if (bodySize <= totalRange * 0.2) {
      score += 2;
    }

    // Bonus for having both shadows (balanced)
    if (lowerShadow > 0 && upperShadow > 0) {
      score += 1;

      // Extra bonus for perfectly balanced shadows
      let shadowDifference = Math.abs(lowerShadow - upperShadow);
      if (shadowDifference <= totalRange * 0.01) {
        // Very similar shadows
        score += 1;
      }
    }

    // Special case: For very small ranges, be more lenient
    // Use direct calculation instead of removed utility function
    if (totalRange <= 1.0 * this.scale) {
      // Replaces: this.getMovementThreshold() * 10
      score += 1;
    }

    // Need at least 4 points to be considered a hammer-like pattern
    return score >= 4;
  }
}

/**
 * Detects HangingManUnconfirmed candlestick pattern in the provided stock data.
 *
 * A HangingManUnconfirmed is a bearish reversal pattern that appears at the end of an uptrend.
 * Unlike the confirmed version, this pattern doesn't require confirmation from the next candle.
 * It consists of:
 * 1. An uptrend in the first 3 candles
 * 2. A hammer-like candle (small body with long lower shadow) at the 4th position
 *
 * This pattern suggests potential bearish reversal but is less reliable than the confirmed version.
 *
 * @param data - Stock data containing OHLC values for at least 4 periods
 * @param config - Configuration object for pattern detection
 * @param config.scale - Scale parameter for approximateEqual function precision (default: 0.001)
 * @param config.minimumThreshold - Minimum threshold for absolute measurements (default: 0.01)
 * @param config.absoluteMinimum - Absolute minimum for very small values (default: 0.001)
 * @param config.movementThresholdBase - Movement threshold multiplier for confirmation (default: 1.0)
 * @param config.movementThresholdScale - Movement threshold scale factor (default: 0.3)
 * @returns True if HangingManUnconfirmed pattern is detected, false otherwise
 *
 * @example
 * ```typescript
 * // Using default configuration
 * const hasHangingManUnconfirmedPattern = hangingmanunconfirmed(stockData);
 *
 * // Using custom configuration
 * const hasHangingManUnconfirmedPattern = hangingmanunconfirmed(stockData, {
 *   scale: 0.002,
 *   minimumThreshold: 0.02,
 *   movementThresholdBase: 1.5
 * });
 *
 * // Backward compatibility with scale parameter
 * const hasHangingManUnconfirmedPattern = hangingmanunconfirmed(stockData, { scale: 0.002 });
 * ```
 */
exports.default = HangingManUnconfirmed;
function hangingmanunconfirmed(data, config = DEFAULT_HANGING_MAN_UNCONFIRMED_CONFIG) {
  return new HangingManUnconfirmed(config).hasPattern(data);
}
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