title: Highcharts two datetime xAxis chart with same ticks interval
body: <p>I two days think about problem, but i don't know make chart with two normalized datetime xAxis.</p>
  
  <ol>
  <li>I Tried use linkedTo and normalize data arrays (but this hard overkill).</li>
  <li>linkedTo showing only overlapped data.</li>
  <li>Without linkedTo and normalization arrays, ticks showed as async like this</li>
  </ol>
  
  <p>Help me, please</p>
  
  <p><a href="https://i.stack.imgur.com/zgg2L.png" rel="nofollow noreferrer">What make chart like this?</a></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>$('#container').highcharts({
      yAxis: {
          gridLineWidth:0  
      },
      xAxis: [
        {
          gridLineWidth: 1,
          type: 'datetime',
          lineColor: '#ff9c00'
        },
        {
          type: 'datetime',
          opposite: true,
          lineColor: '#FF6B6B'
        }
      ],
      series: [
          {
              "name": "first",
              "data": [
                  [
                      1479164400000,
                      7323
                  ],
                  [
                      1479160800000,
                      6204
                  ],
                  [
                      1479157200000,
                      3561
                  ],
                  [
                      1479153600000,
                      9706
                  ],
                  [
                      1479150000000,
                      2539
                  ],
                  [
                      1479146400000,
                      4570
                  ],
                  [
                      1479142800000,
                      4187
                  ],
                  [
                      1479139200000,
                      3631
                  ],
                  [
                      1479135600000,
                      7512
                  ],
                  [
                      1479132000000,
                      2456
                  ],
                  [
                      1479128400000,
                      6983
                  ],
                  [
                      1479124800000,
                      3511
                  ],
                  [
                      1479121200000,
                      2765
                  ],
                  [
                      1479117600000,
                      3401
                  ],
                  [
                      1479114000000,
                      2565
                  ],
                  [
                      1479110400000,
                      4425
                  ],
                  [
                      1479106800000,
                      4592
                  ],
                  [
                      1479103200000,
                      4328
                  ],
                  [
                      1479099600000,
                      2694
                  ],
                  [
                      1479096000000,
                      2787
                  ],
                  [
                      1479092400000,
                      11633
                  ],
                  [
                      1479088800000,
                      3311
                  ],
                  [
                      1479085200000,
                      2839
                  ],
                  [
                      1479081600000,
                      12620
                  ]
              ]
          },
          {
              "name": "second",
              "data": [
                  [
                      1479250800000,
                      22730
                  ],
                  [
                      1479247200000,
                      10695
                  ],
                  [
                      1479243600000,
                      12017
                  ],
                  [
                      1479240000000,
                      12110
                  ],
                  [
                      1479236400000,
                      9689
                  ],
                  [
                      1479232800000,
                      4288
                  ],
                  [
                      1479229200000,
                      3702
                  ],
                  [
                      1479225600000,
                      5575
                  ],
                  [
                      1479222000000,
                      5694
                  ],
                  [
                      1479218400000,
                      3098
                  ],
                  [
                      1479214800000,
                      9885
                  ],
                  [
                      1479211200000,
                      6587
                  ],
                  [
                      1479207600000,
                      3028
                  ],
                  [
                      1479204000000,
                      3281
                  ],
                  [
                      1479200400000,
                      12577
                  ],
                  [
                      1479196800000,
                      3886
                  ],
                  [
                      1479193200000,
                      4014
                  ],
                  [
                      1479189600000,
                      6553
                  ],
                  [
                      1479186000000,
                      2041
                  ],
                  [
                      1479182400000,
                      4056
                  ],
                  [
                      1479178800000,
                      4223
                  ],
                  [
                      1479175200000,
                      4920
                  ],
                  [
                      1479171600000,
                      5432
                  ],
                  [
                      1479168000000,
                      7857
                  ],
                  [
                      1479164400000,
                      7323
                  ],
                  [
                      1479160800000,
                      6204
                  ],
                  [
                      1479157200000,
                      3561
                  ],
                  [
                      1479153600000,
                      9706
                  ],
                  [
                      1479150000000,
                      2539
                  ],
                  [
                      1479146400000,
                      4570
                  ],
                  [
                      1479142800000,
                      4187
                  ],
                  [
                      1479139200000,
                      3631
                  ],
                  [
                      1479135600000,
                      7512
                  ],
                  [
                      1479132000000,
                      2456
                  ],
                  [
                      1479128400000,
                      6983
                  ],
                  [
                      1479124800000,
                      3511
                  ],
                  [
                      1479121200000,
                      2765
                  ],
                  [
                      1479117600000,
                      3401
                  ],
                  [
                      1479114000000,
                      2565
                  ],
                  [
                      1479110400000,
                      4425
                  ],
                  [
                      1479106800000,
                      4592
                  ],
                  [
                      1479103200000,
                      4328
                  ],
                  [
                      1479099600000,
                      2694
                  ],
                  [
                      1479096000000,
                      2787
                  ],
                  [
                      1479092400000,
                      11633
                  ],
                  [
                      1479088800000,
                      3311
                  ],
                  [
                      1479085200000,
                      2839
                  ],
                  [
                      1479081600000,
                      12620
                  ]
              ],
              "xAxis": 1,
              "dashStyle": "shortdot"
          }
      ]
  });</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>#container {
      min-width: 1024px;
      max-width: 1024px;
      height: 300px;
      margin: 1em auto;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script src="http://code.highcharts.com/highcharts.js"&gt;&lt;/script&gt;
  &lt;script src="http://code.highcharts.com/modules/exporting.js"&gt;&lt;/script&gt;
  
  &lt;div id="container"&gt;&lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>