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

Techincal Indicators written in javascript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.DEFAULT_BEARISH_HARAMI_CROSS_CONFIG = void 0;
exports.bearishharamicross = bearishharamicross;
exports.default = void 0;
var _CandlestickFinder = _interopRequireWildcard(require("./CandlestickFinder"));
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 BearishHaramiCross pattern.
 * Only requires scale parameter since this pattern uses direct price comparisons.
 */

/**
 * Default configuration for BearishHaramiCross pattern.
 */
const DEFAULT_BEARISH_HARAMI_CROSS_CONFIG = exports.DEFAULT_BEARISH_HARAMI_CROSS_CONFIG = {
  ..._CandlestickFinder.DEFAULT_CANDLESTICK_CONFIG
};
class BearishHaramiCross extends _CandlestickFinder.default {
  constructor(config) {
    const finalConfig = {
      ...DEFAULT_BEARISH_HARAMI_CROSS_CONFIG,
      ...config
    };
    super(finalConfig);
    this.requiredCount = 2;
    this.name = 'BearishHaramiCross';
  }
  logic(data) {
    // Previous day (index 0) - should be a bullish candle
    let prevOpen = data.open[0];
    let prevClose = data.close[0];
    let prevHigh = data.high[0];
    let prevLow = data.low[0];

    // Current day (index 1) - should be a doji contained within previous body
    let currOpen = data.open[1];
    let currClose = data.close[1];
    let currHigh = data.high[1];
    let currLow = data.low[1];

    // Validate OHLC data
    if (!this.validateOHLC(prevOpen, prevHigh, prevLow, prevClose) || !this.validateOHLC(currOpen, currHigh, currLow, currClose)) {
      return false;
    }

    // Previous day should be a bullish candle
    let isPrevBullish = prevClose > prevOpen;
    let prevBodySize = Math.abs(prevClose - prevOpen);
    let prevRange = prevHigh - prevLow;

    // Ensure the previous candle has a reasonable body size
    // The body should be at least 50% of the total range (more strict requirement)
    let isPrevSignificant = prevRange > 0 && prevBodySize / prevRange >= 0.5;

    // Current day should be a doji (open ≈ close)
    // For higher-priced stocks, use a percentage-based approach for doji detection
    let bodySize = Math.abs(currClose - currOpen);
    let avgPrice = (currOpen + currClose) / 2;
    let percentageDiff = avgPrice > 0 ? bodySize / avgPrice : 0;

    // Consider it a doji if:
    // 1. The absolute difference is within the scale threshold, OR
    // 2. The percentage difference is less than 0.1% (very small body relative to price)
    let isCurrDoji = this.approximateEqual(currOpen, currClose) || percentageDiff <= 0.001;

    // Containment: Current doji should be completely contained within previous candle's body
    // For a bullish previous candle: prevClose > prevOpen
    // So the body range is from prevOpen (bottom) to prevClose (top)
    let bodyTop = prevClose; // For bullish candle, close is higher
    let bodyBottom = prevOpen; // For bullish candle, open is lower

    // Current candle (including shadows) should be contained within previous body
    // Allow for exact boundary matches (<=, >=)
    let hasContainment = currHigh <= bodyTop && currLow >= bodyBottom && currOpen >= bodyBottom && currOpen <= bodyTop && currClose >= bodyBottom && currClose <= bodyTop;
    return isPrevBullish && isPrevSignificant && isCurrDoji && hasContainment;
  }
}
exports.default = BearishHaramiCross;
function bearishharamicross(data, config = DEFAULT_BEARISH_HARAMI_CROSS_CONFIG) {
  return new BearishHaramiCross(config).hasPattern(data);
}
//# sourceMappingURL=BearishHaramiCross.js.map