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

Techincal Indicators written in javascript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = exports.DEFAULT_SHOOTING_STAR_UNCONFIRMED_CONFIG = void 0;
exports.shootingstarunconfirmed = shootingstarunconfirmed;
var _ShootingStar = _interopRequireWildcard(require("./ShootingStar"));
var _AverageLoss = require("../Utils/AverageLoss");
var _AverageGain = require("../Utils/AverageGain");
var _BearishInvertedHammerStick = require("./BearishInvertedHammerStick");
var _BullishInvertedHammerStick = require("./BullishInvertedHammerStick");
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 ShootingStarUnconfirmed pattern.
 * Extends ShootingStar configuration.
 */

/**
 * Default configuration for ShootingStarUnconfirmed pattern.
 */
const DEFAULT_SHOOTING_STAR_UNCONFIRMED_CONFIG = exports.DEFAULT_SHOOTING_STAR_UNCONFIRMED_CONFIG = {
  ..._ShootingStar.DEFAULT_SHOOTING_STAR_CONFIG
};
class ShootingStarUnconfirmed extends _ShootingStar.default {
  constructor(config) {
    const finalConfig = {
      ...DEFAULT_SHOOTING_STAR_UNCONFIRMED_CONFIG,
      ...config
    };
    super(finalConfig);
    this.name = 'ShootingStarUnconfirmed';
    this.requiredCount = 4; // Reduced from 5 since no confirmation needed
  }
  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 inverted hammer pattern without confirmation
    let isPattern = this.upwardTrend(data, false);
    isPattern = isPattern && this.includesInvertedHammer(data, false);
    return isPattern;
  }
  upwardTrend(data, confirm = false) {
    // For unconfirmed pattern, we analyze the first 3 candles for upward trend
    let end = 3;

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

    // Analyze trends in closing prices of the first three candlesticks
    // For ascending order data, we look at the first 'end' elements
    let gains = (0, _AverageGain.averagegain)({
      values: data.close.slice(0, end),
      period: end - 1
    });
    let losses = (0, _AverageLoss.averageloss)({
      values: data.close.slice(0, end),
      period: end - 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 actual price movement
    let closeSlice = data.close.slice(0, end);
    let priceRange = Math.max(...closeSlice) - Math.min(...closeSlice);
    let minMovement = priceRange * 0.01; // At least 1% movement

    // Upward trend, so more gains than losses, and significant movement
    return latestGain > latestLoss && latestGain > minMovement;
  }
  includesInvertedHammer(data, confirm = false) {
    // For unconfirmed pattern, check the last candle (index 3)
    let start = 3;
    let end = 4;

    // Ensure we have the required data
    if (data.close.length < end) {
      return false;
    }
    let possibleInvertedHammerData = {
      open: data.open.slice(start, end),
      close: data.close.slice(start, end),
      low: data.low.slice(start, end),
      high: data.high.slice(start, end)
    };

    // Use the updated inverted hammer functions with config objects
    let isPattern = (0, _BearishInvertedHammerStick.bearishinvertedhammerstick)(possibleInvertedHammerData, _BearishInvertedHammerStick.DEFAULT_BEARISH_INVERTED_HAMMER_CONFIG);
    isPattern = isPattern || (0, _BullishInvertedHammerStick.bullishinvertedhammerstick)(possibleInvertedHammerData, _BullishInvertedHammerStick.DEFAULT_BULLISH_INVERTED_HAMMER_STICK_CONFIG);

    // If not detected by standard inverted hammer logic, check for doji with upper shadow
    if (!isPattern) {
      let daysOpen = possibleInvertedHammerData.open[0];
      let daysClose = possibleInvertedHammerData.close[0];
      let daysHigh = possibleInvertedHammerData.high[0];
      let daysLow = possibleInvertedHammerData.low[0];

      // Check for doji (open ≈ close) with long upper shadow
      let isDoji = this.approximateEqual(daysOpen, daysClose);
      let hasMinimalLowerShadow = this.approximateEqual(daysLow, Math.min(daysOpen, daysClose));
      let upperShadow = daysHigh - Math.max(daysOpen, daysClose);
      let totalRange = daysHigh - daysLow;

      // For doji shooting star: minimal body, minimal lower shadow, significant upper shadow
      isPattern = isDoji && hasMinimalLowerShadow && upperShadow >= totalRange * 0.6;
    }
    return isPattern;
  }
}

/**
 * Detects ShootingStarUnconfirmed candlestick pattern in the provided stock data.
 *
 * A ShootingStarUnconfirmed 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. An inverted hammer-like candle (small body with long upper 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)
 * @returns True if ShootingStarUnconfirmed pattern is detected, false otherwise
 *
 * @example
 * ```typescript
 * // Using default configuration
 * const hasShootingStarUnconfirmedPattern = shootingstarunconfirmed(stockData);
 *
 * // Using custom configuration
 * const hasShootingStarUnconfirmedPattern = shootingstarunconfirmed(stockData, {
 *   scale: 0.002
 * });
 *
 * // Backward compatibility with scale parameter
 * const hasShootingStarUnconfirmedPattern = shootingstarunconfirmed(stockData, { scale: 0.002 });
 * ```
 */
exports.default = ShootingStarUnconfirmed;
function shootingstarunconfirmed(data, config = DEFAULT_SHOOTING_STAR_UNCONFIRMED_CONFIG) {
  return new ShootingStarUnconfirmed(config).hasPattern(data);
}
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