@dickyindra/klinecharts/lib/technicalindicator/momentum/brar.js

Lightweight k-line chart built with html5 canvas

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at

 * http://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * BRAR
 * 默认参数是26。
 * 公式N日BR=N日内（H－CY）之和除以N日内（CY－L）之和*100，
 * 其中，H为当日最高价，L为当日最低价，CY为前一交易日的收盘价，N为设定的时间参数。
 * N日AR=(N日内（H－O）之和除以N日内（O－L）之和)*100，
 * 其中，H为当日最高价，L为当日最低价，O为当日开盘价，N为设定的时间参数
 *
 */
var _default = {
  name: 'BRAR',
  shortName: 'BRAR',
  calcParams: [26],
  plots: [{
    key: 'br',
    title: 'BR: ',
    type: 'line'
  }, {
    key: 'ar',
    title: 'AR: ',
    type: 'line'
  }],
  calcTechnicalIndicator: function calcTechnicalIndicator(dataList, _ref) {
    var params = _ref.params;
    var hcy = 0;
    var cyl = 0;
    var ho = 0;
    var ol = 0;
    return dataList.map(function (kLineData, i) {
      var brar = {};
      var high = kLineData.high;
      var low = kLineData.low;
      var open = kLineData.open;
      var preClose = (dataList[i - 1] || kLineData).close;
      ho += high - open;
      ol += open - low;
      hcy += high - preClose;
      cyl += preClose - low;

      if (i >= params[0] - 1) {
        if (ol !== 0) {
          brar.ar = ho / ol * 100;
        } else {
          brar.ar = 0;
        }

        if (cyl !== 0) {
          brar.br = hcy / cyl * 100;
        } else {
          brar.br = 0;
        }

        var agoKLineData = dataList[i - (params[0] - 1)];
        var agoHigh = agoKLineData.high;
        var agoLow = agoKLineData.low;
        var agoOpen = agoKLineData.open;
        var agoPreClose = (dataList[i - params[0]] || dataList[i - (params[0] - 1)]).close;
        hcy -= agoHigh - agoPreClose;
        cyl -= agoPreClose - agoLow;
        ho -= agoHigh - agoOpen;
        ol -= agoOpen - agoLow;
      }

      return brar;
    });
  }
};
exports.default = _default;