/** * @license Highstock JS v11.4.1 (2024-04-04) * * Indicator series type for Highcharts Stock * * (c) 2010-2024 Paweł Fus * * License: www.highcharts.com/license */ (function (factory) { if (typeof module === 'object' && module.exports) { factory['default'] = factory; module.exports = factory; } else if (typeof define === 'function' && define.amd) { define('highcharts/indicators/rsi', ['highcharts', 'highcharts/modules/stock'], function (Highcharts) { factory(Highcharts); factory.Highcharts = Highcharts; return factory; }); } else { factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined); } }(function (Highcharts) { 'use strict'; var _modules = Highcharts ? Highcharts._modules : {}; function _registerModule(obj, path, args, fn) { if (!obj.hasOwnProperty(path)) { obj[path] = fn.apply(null, args); if (typeof CustomEvent === 'function') { window.dispatchEvent(new CustomEvent( 'HighchartsModuleLoaded', { detail: { path: path, module: obj[path] } } )); } } } _registerModule(_modules, 'Stock/Indicators/RSI/RSIIndicator.js', [_modules['Core/Series/SeriesRegistry.js'], _modules['Core/Utilities.js']], function (SeriesRegistry, U) { /* * * * License: www.highcharts.com/license * * !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!! * * */ const { sma: SMAIndicator } = SeriesRegistry.seriesTypes; const { isNumber, merge } = U; /* * * * Functions * * */ // Utils: /** * */ function toFixed(a, n) { return parseFloat(a.toFixed(n)); } /* * * * Class * * */ /** * The RSI series type. * * @private * @class * @name Highcharts.seriesTypes.rsi * * @augments Highcharts.Series */ class RSIIndicator extends SMAIndicator { /* * * * Functions * * */ getValues(series, params) { const period = params.period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, decimals = params.decimals, // RSI starts calculations from the second point // Cause we need to calculate change between two points RSI = [], xData = [], yData = []; let gain = 0, loss = 0, index = params.index, range = 1, RSIPoint, change, avgGain, avgLoss, i, values; if ((xVal.length < period)) { return; } if (isNumber(yVal[0])) { values = yVal; } else { // In case of the situation, where the series type has data length // longer then 4 (HLC, range), this ensures that we are not trying // to reach the index out of bounds index = Math.min(index, yVal[0].length - 1); values = yVal .map((value) => value[index]); } // Calculate changes for first N points while (range < period) { change = toFixed(values[range] - values[range - 1], decimals); if (change > 0) { gain += change; } else { loss += Math.abs(change); } range++; } // Average for first n-1 points: avgGain = toFixed(gain / (period - 1), decimals); avgLoss = toFixed(loss / (period - 1), decimals); for (i = range; i < yValLen; i++) { change = toFixed(values[i] - values[i - 1], decimals); if (change > 0) { gain = change; loss = 0; } else { gain = 0; loss = Math.abs(change); } // Calculate smoothed averages, RS, RSI values: avgGain = toFixed((avgGain * (period - 1) + gain) / period, decimals); avgLoss = toFixed((avgLoss * (period - 1) + loss) / period, decimals); // If average-loss is equal zero, then by definition RSI is set // to 100: if (avgLoss === 0) { RSIPoint = 100; // If average-gain is equal zero, then by definition RSI is set // to 0: } else if (avgGain === 0) { RSIPoint = 0; } else { RSIPoint = toFixed(100 - (100 / (1 + (avgGain / avgLoss))), decimals); } RSI.push([xVal[i], RSIPoint]); xData.push(xVal[i]); yData.push(RSIPoint); } return { values: RSI, xData: xData, yData: yData }; } } /* * * * Static Properties * * */ /** * Relative strength index (RSI) technical indicator. This series * requires the `linkedTo` option to be set and should be loaded after * the `stock/indicators/indicators.js` file. * * @sample stock/indicators/rsi * RSI indicator * * @extends plotOptions.sma * @since 6.0.0 * @product highstock * @requires stock/indicators/indicators * @requires stock/indicators/rsi * @optionparent plotOptions.rsi */ RSIIndicator.defaultOptions = merge(SMAIndicator.defaultOptions, { params: { decimals: 4, index: 3 } }); SeriesRegistry.registerSeriesType('rsi', RSIIndicator); /* * * * Default Export * * */ /* * * * API Options * * */ /** * A `RSI` series. If the [type](#series.rsi.type) option is not * specified, it is inherited from [chart.type](#chart.type). * * @extends series,plotOptions.rsi * @since 6.0.0 * @product highstock * @excluding dataParser, dataURL * @requires stock/indicators/indicators * @requires stock/indicators/rsi * @apioption series.rsi */ ''; // To include the above in the js output return RSIIndicator; }); _registerModule(_modules, 'masters/indicators/rsi.src.js', [_modules['Core/Globals.js']], function (Highcharts) { return Highcharts; }); }));