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

Techincal Indicators written in javascript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.DEFAULT_BEARISH_SPINNING_TOP_CONFIG = void 0;
exports.bearishspinningtop = bearishspinningtop;
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 BearishSpinningTop pattern.
 */

/**
 * Default configuration for BearishSpinningTop pattern.
 */
const DEFAULT_BEARISH_SPINNING_TOP_CONFIG = exports.DEFAULT_BEARISH_SPINNING_TOP_CONFIG = {
  ..._CandlestickFinder.DEFAULT_CANDLESTICK_CONFIG,
  maxBodyLength: 1 // Body should be <= 1 price units to be considered "small"
};
class BearishSpinningTop extends _CandlestickFinder.default {
  /** Maximum body length for small body detection */
  maxBodyLength;
  constructor(config) {
    const finalConfig = {
      ...DEFAULT_BEARISH_SPINNING_TOP_CONFIG,
      ...config
    };
    super(finalConfig);
    this.name = 'BearishSpinningTop';
    this.requiredCount = 1;
    this.maxBodyLength = finalConfig.maxBodyLength;
  }
  logic(data) {
    let daysOpen = data.open[0];
    let daysClose = data.close[0];
    let daysHigh = data.high[0];
    let daysLow = data.low[0];

    // Basic OHLC validation
    if (!this.validateOHLC(daysOpen, daysHigh, daysLow, daysClose)) {
      return false;
    }

    // Must be bearish (close < open)
    let isBearish = daysClose < daysOpen;
    let bodyLength = Math.abs(daysClose - daysOpen);
    let totalRange = daysHigh - daysLow;

    // For bearish candles: top of body is open, bottom is close
    let upperShadowLength = Math.abs(daysHigh - daysOpen);
    let lowerShadowLength = Math.abs(daysClose - daysLow);

    // Check if body is small based on fixed length threshold
    let hasSmallBody = bodyLength <= this.maxBodyLength;

    // Spinning top: bearish + small body + body length < both shadow lengths
    let isBearishSpinningTop = isBearish && hasSmallBody && bodyLength < upperShadowLength && bodyLength < lowerShadowLength;
    return isBearishSpinningTop;
  }
}
exports.default = BearishSpinningTop;
function bearishspinningtop(data, config = DEFAULT_BEARISH_SPINNING_TOP_CONFIG) {
  return new BearishSpinningTop(config).hasPattern(data);
}
//# sourceMappingURL=BearishSpinningTop.js.map