title: Several Custom Audience Retargeting pixels on the same page
body: <p>If one were to place several retargeting pixels into one webpage, how would that be done?</p>
  
  <p>The code below is the default pixel you're given which tracks and adds customers to your custom audience:</p>
  
  <pre><code>&lt;script&gt;(function() {
    var _fbq = window._fbq || (window._fbq = []);
    if (!_fbq.loaded) {
      var fbds = document.createElement('script');
      fbds.async = true;
      fbds.src = '//connect.facebook.net/en_US/fbds.js';
      var s = document.getElementsByTagName('script')[0];
      s.parentNode.insertBefore(fbds, s);
      _fbq.loaded = true;
    }
    _fbq.push(['addPixelId', '12345']);
  })();
  window._fbq = window._fbq || [];
  window._fbq.push(['track', 'PixelInitialized', {}]);
  &lt;/script&gt;
  &lt;noscript&gt;&lt;img height="1" width="1" border="0" alt="" style="display:none" src="https://www.facebook.com/tr?id=12345&amp;amp;ev=NoScript" /&gt;&lt;/noscript&gt;
  </code></pre>
  
  <p>The only unique part of this snippet is the <code>ad_account_pixel_id</code>, <strong>12345</strong> in the example. With Facebook <strong>Conversion</strong> pixels adding several IDs is very simple, as the initialization is all general. But here, an id is added by <code>_fbq.push(['addPixelId', '12345']);</code> to later be tracked with <code>window._fbq.push(['track', 'PixelInitialized', {}]);</code>, where <code>PixelInitialized</code> is a default callback event.</p>
  
  <p>I want to combine several Retargeting Pixels using the least amount of code possible, so adding them one after the other is not an option. Can I simply add a new <code>_fbq.push(['addPixelId', '99999']);</code> after and track that? My gut tells me these will interfere, why else wouldn't the initialization be general?</p>
  
  <p>The reason I'm asking and not testing by trial and error is that the data is updated per 100 visitors, which would make the testing process hell. Also, there is no documentation of the <code>fbq</code> class. So if anyone has encountered this, or has a clue anyway, please do help!</p>
  
  <p>Appreciate any response, even if not in the form of an actual answer.</p>
  
  <p>Thanks in advance,</p>
  
  <p>Fredrik</p>