Edit in JSFiddle

import { CIQ } from "https://jsfiddle.chartiq.com/chart/js/advanced.js";

// Activate the License Key
import getLicenseKey from "https://jsfiddle.chartiq.com/chart/key.js";
getLicenseKey(CIQ);


import quoteFeedSimulator from "https://jsfiddle.chartiq.com/chart/examples/feeds/quoteFeedSimulator.js";

// Declare a CIQ.ChartEngine object. This is the main object for drawing charts.
const stxx = new CIQ.ChartEngine({
  container: document.querySelector(".chartContainer")
});

// connect the chart to the feed
stxx.attachQuoteFeed(quoteFeedSimulator, {
  refreshInterval: 15
});


stxx.setChartType('line');

// Load the primary chart
stxx.loadChart(
  "SPY", null,
  function() {

    // In the callback, add a series that creates a renderer with a y axis on the left. 
    // Make sure to give it an explicit name so you can then use it to attach more series to it,
    // allowing multiple series to be linked to the same left y-axis. 
    
    // Note that all series attached to the same renderer become one group, and will be moved and deleted together.
    // So to maintain individuality, you must have a render per series: See https://jsfiddle.net/chartiq/uo97g326/

    stxx.addSeries(
      "NOK", {
        renderer: "Lines", // create a line renderer
        //type: "mountain", 				// of mountain type
        yAxis: { // and give it its own y axis 
          position: "left", // on the left
          textStyle: "#0044FF", // with labels of color #0044FF
          decimalPlaces: 0, // no decimal places on the labels
          maxDecimalPlaces: 0, // and no defimal places on the last price floating label either.
        },
        name: "left_axis_renderer", // Call the custom renderer "left_axis_renderer", so it can be referenced by other series.
        color: "#FFBE00", // Set the line color to "#FFBE00"
        //width: 4,									// and a width of 4.
        display: "NOK Sample", // Finally, use a different display name of "NOK Sample" on the tooltip.
      },
      function() {
        stxx.addSeries( // Now that the first series and rederer has been set
          "SNE", { // add the 2nd series using that same renderer.
            name: "left_axis_renderer",
            color: "#FF1300",
            display: "Sony Sample",
          }
        );
      }
    );


    // This one attaches automatically to the primary series. So no renderer/axis is needed.
    stxx.addSeries("IBM", {
      display: "Primary axis line - right",
      color: 'purple',
      shareYAxis: true
    }, function() {});
  }
);

<link rel="stylesheet" type="text/css" href="https://jsfiddle.chartiq.com/chart/css/stx-chart.css" media="screen" />

<div class="chartContainer" style="width:100%;height:400px;position:relative;"></div>