wwbsr/node_modules/highcharts/indicators/mfi.src.js

/**
 * @license Highstock JS v8.2.0 (2020-08-20)
 *
 * Money Flow Index indicator for Highstock
 *
 * (c) 2010-2019 Grzegorz Blachliński
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function (factory) {
    if (typeof module === 'object' && module.exports) {
        factory['default'] = factory;
        module.exports = factory;
    } else if (typeof define === 'function' && define.amd) {
        define('highcharts/indicators/mfi', ['highcharts', 'highcharts/modules/stock'], function (Highcharts) {
            factory(Highcharts);
            factory.Highcharts = Highcharts;
            return factory;
        });
    } else {
        factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
    }
}(function (Highcharts) {
    var _modules = Highcharts ? Highcharts._modules : {};
    function _registerModule(obj, path, args, fn) {
        if (!obj.hasOwnProperty(path)) {
            obj[path] = fn.apply(null, args);
        }
    }
    _registerModule(_modules, 'Stock/Indicators/MFIIndicator.js', [_modules['Core/Utilities.js']], function (U) {
        /* *
         *
         *  Money Flow Index indicator for Highstock
         *
         *  (c) 2010-2020 Grzegorz Blachliński
         *
         *  License: www.highcharts.com/license
         *
         *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
         *
         * */
        var error = U.error,
            isArray = U.isArray,
            seriesType = U.seriesType;
        /* eslint-disable require-jsdoc */
        // Utils:
        function sumArray(array) {
            return array.reduce(function (prev, cur) {
                return prev + cur;
            });
        }
        function toFixed(a, n) {
            return parseFloat(a.toFixed(n));
        }
        function calculateTypicalPrice(point) {
            return (point[1] + point[2] + point[3]) / 3;
        }
        function calculateRawMoneyFlow(typicalPrice, volume) {
            return typicalPrice * volume;
        }
        /* eslint-enable require-jsdoc */
        /**
         * The MFI series type.
         *
         * @private
         * @class
         * @name Highcharts.seriesTypes.mfi
         *
         * @augments Highcharts.Series
         */
        seriesType('mfi', 'sma', 
        /**
         * Money Flow Index. This series requires `linkedTo` option to be set and
         * should be loaded after the `stock/indicators/indicators.js` file.
         *
         * @sample stock/indicators/mfi
         *         Money Flow Index Indicator
         *
         * @extends      plotOptions.sma
         * @since        6.0.0
         * @product      highstock
         * @requires     stock/indicators/indicators
         * @requires     stock/indicators/mfi
         * @optionparent plotOptions.mfi
         */
        {
            /**
             * @excluding index
             */
            params: {
                period: 14,
                /**
                 * The id of volume series which is mandatory.
                 * For example using OHLC data, volumeSeriesID='volume' means
                 * the indicator will be calculated using OHLC and volume values.
                 */
                volumeSeriesID: 'volume',
                /**
                 * Number of maximum decimals that are used in MFI calculations.
                 */
                decimals: 4
            }
        }, 
        /**
         * @lends Highcharts.Series#
         */
        {
            nameBase: 'Money Flow Index',
            getValues: function (series, params) {
                var period = params.period,
                    xVal = series.xData,
                    yVal = series.yData,
                    yValLen = yVal ? yVal.length : 0,
                    decimals = params.decimals, 
                    // MFI starts calculations from the second point
                    // Cause we need to calculate change between two points
                    range = 1,
                    volumeSeries = series.chart.get(params.volumeSeriesID),
                    yValVolume = (volumeSeries && volumeSeries.yData),
                    MFI = [],
                    isUp = false,
                    xData = [],
                    yData = [],
                    positiveMoneyFlow = [],
                    negativeMoneyFlow = [],
                    newTypicalPrice,
                    oldTypicalPrice,
                    rawMoneyFlow,
                    negativeMoneyFlowSum,
                    positiveMoneyFlowSum,
                    moneyFlowRatio,
                    MFIPoint,
                    i;
                if (!volumeSeries) {
                    error('Series ' +
                        params.volumeSeriesID +
                        ' not found! Check `volumeSeriesID`.', true, series.chart);
                    return;
                }
                // MFI requires high low and close values
                if ((xVal.length <= period) || !isArray(yVal[0]) ||
                    yVal[0].length !== 4 ||
                    !yValVolume) {
                    return;
                }
                // Calculate first typical price
                newTypicalPrice = calculateTypicalPrice(yVal[range]);
                // Accumulate first N-points
                while (range < period + 1) {
                    // Calculate if up or down
                    oldTypicalPrice = newTypicalPrice;
                    newTypicalPrice = calculateTypicalPrice(yVal[range]);
                    isUp = newTypicalPrice >= oldTypicalPrice;
                    // Calculate raw money flow
                    rawMoneyFlow = calculateRawMoneyFlow(newTypicalPrice, yValVolume[range]);
                    // Add to array
                    positiveMoneyFlow.push(isUp ? rawMoneyFlow : 0);
                    negativeMoneyFlow.push(isUp ? 0 : rawMoneyFlow);
                    range++;
                }
                for (i = range - 1; i < yValLen; i++) {
                    if (i > range - 1) {
                        // Remove first point from array
                        positiveMoneyFlow.shift();
                        negativeMoneyFlow.shift();
                        // Calculate if up or down
                        oldTypicalPrice = newTypicalPrice;
                        newTypicalPrice = calculateTypicalPrice(yVal[i]);
                        isUp = newTypicalPrice > oldTypicalPrice;
                        // Calculate raw money flow
                        rawMoneyFlow = calculateRawMoneyFlow(newTypicalPrice, yValVolume[i]);
                        // Add to array
                        positiveMoneyFlow.push(isUp ? rawMoneyFlow : 0);
                        negativeMoneyFlow.push(isUp ? 0 : rawMoneyFlow);
                    }
                    // Calculate sum of negative and positive money flow:
                    negativeMoneyFlowSum = sumArray(negativeMoneyFlow);
                    positiveMoneyFlowSum = sumArray(positiveMoneyFlow);
                    moneyFlowRatio = positiveMoneyFlowSum / negativeMoneyFlowSum;
                    MFIPoint = toFixed(100 - (100 / (1 + moneyFlowRatio)), decimals);
                    MFI.push([xVal[i], MFIPoint]);
                    xData.push(xVal[i]);
                    yData.push(MFIPoint);
                }
                return {
                    values: MFI,
                    xData: xData,
                    yData: yData
                };
            }
        });
        /**
         * A `MFI` series. If the [type](#series.mfi.type) option is not specified, it
         * is inherited from [chart.type](#chart.type).
         *
         * @extends   series,plotOptions.mfi
         * @since     6.0.0
         * @excluding dataParser, dataURL
         * @product   highstock
         * @requires  stock/indicators/indicators
         * @requires  stock/indicators/mfi
         * @apioption series.mfi
         */
        ''; // to include the above in the js output

    });
    _registerModule(_modules, 'masters/indicators/mfi.src.js', [], function () {


    });
}));