@thuantan2060/technicalindicators
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Techincal Indicators written in javascript
148 lines (135 loc) • 6.23 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = exports.DEFAULT_HAMMER_PATTERN_CONFIG = void 0;
exports.hammerpattern = hammerpattern;
var _CandlestickFinder = _interopRequireWildcard(require("./CandlestickFinder"));
var _AverageLoss = require("../Utils/AverageLoss");
var _AverageGain = require("../Utils/AverageGain");
var _BearishHammerStick = require("./BearishHammerStick");
var _BearishInvertedHammerStick = require("./BearishInvertedHammerStick");
var _BullishHammerStick = require("./BullishHammerStick");
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 HammerPattern.
* Only requires scale parameter since this pattern uses direct price comparisons.
*/
/**
* Default configuration for HammerPattern.
*/
const DEFAULT_HAMMER_PATTERN_CONFIG = exports.DEFAULT_HAMMER_PATTERN_CONFIG = {
..._CandlestickFinder.DEFAULT_CANDLESTICK_CONFIG,
..._BullishHammerStick.DEFAULT_BULLISH_HAMMER_CONFIG,
..._BullishInvertedHammerStick.DEFAULT_BULLISH_INVERTED_HAMMER_STICK_CONFIG,
..._BearishHammerStick.DEFAULT_BEARISH_HAMMER_STICK_CONFIG,
..._BearishInvertedHammerStick.DEFAULT_BEARISH_INVERTED_HAMMER_CONFIG
};
class HammerPattern extends _CandlestickFinder.default {
config;
constructor(config) {
const finalConfig = {
...DEFAULT_HAMMER_PATTERN_CONFIG,
...config
};
super(finalConfig);
this.name = 'HammerPattern';
this.requiredCount = 5;
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;
}
}
let isPattern = this.downwardTrend(data);
isPattern = isPattern && this.includesHammer(data);
isPattern = isPattern && this.hasConfirmation(data);
return isPattern;
}
downwardTrend(data, confirm = true) {
// Ensure we have enough data
if (data.close.length < (confirm ? 5 : 4)) {
return false;
}
// Analyze trend in the first 3 candles (indices 0, 1, 2)
// These should show a downward trend leading to the hammer
let trendData = data.close.slice(0, 3);
// Calculate average gains and losses over the trend period
let gains = (0, _AverageGain.averagegain)({
values: trendData,
period: 2
});
let losses = (0, _AverageLoss.averageloss)({
values: trendData,
period: 2
});
// 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 priceRange = Math.max(...trendData) - Math.min(...trendData);
let minMovement = priceRange * 0.01; // At least 1% movement
// For a downward trend, we expect more losses than gains
// Also check that the closing prices generally decline
let overallDecline = trendData[0] > trendData[trendData.length - 1];
return latestLoss > latestGain && latestLoss > minMovement && overallDecline;
}
includesHammer(data, confirm = true) {
// Ensure we have the required data
if (data.close.length < (confirm ? 5 : 4)) {
return false;
}
// Check for hammer at index 3 (4th candle)
let hammerIndex = 3;
let possibleHammerData = {
open: [data.open[hammerIndex]],
close: [data.close[hammerIndex]],
low: [data.low[hammerIndex]],
high: [data.high[hammerIndex]]
};
// Use the appropriate function signatures - mix of updated and not yet updated
let isPattern = (0, _BearishHammerStick.bearishhammerstick)(possibleHammerData, this.config);
isPattern = isPattern || (0, _BearishInvertedHammerStick.bearishinvertedhammerstick)(possibleHammerData, this.config);
isPattern = isPattern || (0, _BullishHammerStick.bullishhammerstick)(possibleHammerData, this.config);
isPattern = isPattern || (0, _BullishInvertedHammerStick.bullishinvertedhammerstick)(possibleHammerData, this.config);
return isPattern;
}
hasConfirmation(data) {
// Ensure we have enough data
if (data.close.length < 5) {
return false;
}
let possibleHammer = {
open: data.open[3],
close: data.close[3],
low: data.low[3],
high: data.high[3]
};
let possibleConfirmation = {
open: data.open[4],
close: data.close[4],
low: data.low[4],
high: data.high[4]
};
// Validate OHLC data
if (!this.validateOHLC(possibleHammer.open, possibleHammer.high, possibleHammer.low, possibleHammer.close) || !this.validateOHLC(possibleConfirmation.open, possibleConfirmation.high, possibleConfirmation.low, possibleConfirmation.close)) {
return false;
}
// Confirmation candlestick should be bullish (close > open)
let isBullishConfirmation = possibleConfirmation.close > possibleConfirmation.open;
// The confirmation should close higher than the hammer's close
// and show meaningful upward movement
let upwardMovement = possibleConfirmation.close - possibleHammer.close;
let minMovement = (possibleHammer.high - possibleHammer.low) * 0.1; // At least 10% of hammer's range
return isBullishConfirmation && upwardMovement > 0 && upwardMovement >= minMovement;
}
}
exports.default = HammerPattern;
function hammerpattern(data, config = DEFAULT_HAMMER_PATTERN_CONFIG) {
return new HammerPattern(config).hasPattern(data);
}
//# sourceMappingURL=HammerPattern.js.map