Angular Candlestick & Line Combination Chart

/* app.component.ts */
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  chart:any;
  getChartInstance(chart: object) {
    this.chart = chart;
    let sma = this.calculateSMA(this.chartOptions.data[0].dataPoints, 7);
    this.chart.addTo("data", {
      type: "line",
      showInLegend: true, 
      markerSize: 0,
      yValueFormatString: "$#,###.00", 
      name: "Simple Moving Average",
      dataPoints: sma
    });
  }
  
  calculateSMA(dps: any, period: any){
    let avg = function(dps:any) {
      let sum = 0, period = 0, val;
      for (let i = 0; i < dps.length; i++) {
        val = dps[i].y[3]; sum += val; period++;
      }
      return sum / period;
    };
    let result = [], val;
    period = period || 5;
    for (let i=0; i < period; i++)
      result.push({ x: dps[i].x , y: null});
    for (let i=period - 1, len=dps.length; i < len; i++) {
      val = avg(dps.slice(i - period + 1, i));
      if (isNaN(val))
        result.push({ x: dps[i].x, y: null});
      else
        result.push({ x: dps[i].x, y: val});
    }
    return result;
  }

  chartOptions = {
    title:{
      text:"Technical Indicators: SMA"
    },
    subtitles: [{
      text:"Simple Moving Average"
    }],
    axisY: {
      title: "Price in USD",
      prefix: "$"
    },
    axisX: {
      valueFormatString: "MMM D",
    },
    legend: {
      verticalAlign: "bottom",
      dockInsidePlotArea: "inside",
      cursor: "pointer",
      itemclick: function (e:any) {
        if (typeof (e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
          e.dataSeries.visible = false;
        } else {
          e.dataSeries.visible = true;
        }
        e.chart.render();
      }
    },
    toolTip: {
      shared: true
    },
    data: [{
      type: "candlestick",
      showInLegend: true,
      name: "Stock Price",
      yValueFormatString: "$#,###.00",
      xValueType: "dateTime",
      dataPoints: [
        { x: new Date("2021-01-01"), y: [737.708374, 749.201843, 719.792236, 730.367554] },
        { x: new Date("2021-01-02"), y: [730.402649, 786.798462, 718.109497, 774.534973] },
        { x: new Date("2021-01-03"), y: [774.511841, 1006.565002, 771.561646, 975.50769] },
        { x: new Date("2021-01-04"), y: [977.058838, 1153.189209, 912.305359, 1040.233032] },
        { x: new Date("2021-01-05"), y: [1041.498779, 1129.37146, 986.811279, 1100.006104] },
        { x: new Date("2021-01-06"), y: [1101.005005, 1209.428589, 1064.233398, 1207.112183] },
        { x: new Date("2021-01-07"), y: [1208.078369, 1282.57959, 1167.443115, 1225.678101] },
        { x: new Date("2021-01-08"), y: [1225.967896, 1273.827515, 1076.081543, 1224.197144] },
        { x: new Date("2021-01-09"), y: [1223.740479, 1303.871826, 1182.270386, 1281.077271] },
        { x: new Date("2021-01-10"), y: [1280.871094, 1347.926147, 1194.715576, 1262.246704] },
        { x: new Date("2021-01-11"), y: [1261.622925, 1261.622925, 924.922607, 1090.145386] },
        { x: new Date("2021-01-12"), y: [1088.526733, 1149.240234, 1012.76416, 1043.43457] },
        { x: new Date("2021-01-13"), y: [1043.740967, 1134.338501, 994.549072, 1130.73938] },
        { x: new Date("2021-01-14"), y: [1130.231201, 1244.163086, 1093.060791, 1218.453003] },
        { x: new Date("2021-01-15"), y: [1221.877197, 1250.505859, 1090.721069, 1171.834595] },
        { x: new Date("2021-01-16"), y: [1171.443115, 1290.053589, 1157.623779, 1233.537598] },
        { x: new Date("2021-01-17"), y: [1233.453369, 1265.644653, 1174.38855, 1230.172241] },
        { x: new Date("2021-01-18"), y: [1230.313232, 1259.450073, 1187.311035, 1257.279541] },
        { x: new Date("2021-01-19"), y: [1257.43457, 1432.300049, 1254.522949, 1377.295898] },
        { x: new Date("2021-01-20"), y: [1375.248413, 1405.744141, 1243.299927, 1382.274048] },
        { x: new Date("2021-01-21"), y: [1382.684448, 1382.684448, 1098.476196, 1121.570923] },
        { x: new Date("2021-01-22"), y: [1118.889038, 1271.687622, 1046.596558, 1236.512207] },
        { x: new Date("2021-01-23"), y: [1235.267944, 1272.151123, 1200.893311, 1230.990601] },
        { x: new Date("2021-01-24"), y: [1231.210571, 1395.111328, 1225.274048, 1391.609375] },
        { x: new Date("2021-01-25"), y: [1390.639893, 1467.784912, 1304.973999, 1324.414795] },
        { x: new Date("2021-01-26"), y: [1323.741699, 1376.085083, 1253.340332, 1357.058105] },
        { x: new Date("2021-01-27"), y: [1358.333374, 1368.074097, 1215.311279, 1253.187134] },
        { x: new Date("2021-01-28"), y: [1251.279785, 1356.288696, 1226.17395, 1332.492188] },
        { x: new Date("2021-01-29"), y: [1369.086792, 1428.981201, 1292.240112, 1382.522827] },
        { x: new Date("2021-01-30"), y: [1382.231934, 1402.39978, 1328.529053, 1376.115479] },
        { x: new Date("2021-01-31"), y: [1376.823608, 1378.916016, 1288.501587, 1314.986206] }
      ]
    }]
  }
}