Facebook Pixel is Facebook's analytics tracker. Its tracking can be used with your exported in5 content by manually editing the HTML or adding the code to the Resources section of the Export HTML5 with in5 dialog.
Here is some sample code (as it comes from Facebook) that would need to be attached as HTML because of the <script> tag.
<!-- FB Pixel Code --> <script> !function(f,b,e,v,n,t,s) {if(f.fbq)return;n=f.fbq=function(){n.callMethod? n.callMethod.apply(n,arguments):n.queue.push(arguments)}; if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0'; n.queue=[];t=b.createElement(e);t.async=!0; t.src=v;s=b.getElementsByTagName(e)[0]; s.parentNode.insertBefore(t,s)}(window, document,'script', 'https://connect.facebook.net/en_US/fbevents.js'); fbq('init','id123'); fbq('track','PageView'); </script> <noscript><img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=id123&ev=PageView&noscript=1" /></noscript> <!-- End FB Pixel Code -->However, you could also copy the code inside the <script> tag (up to /script>) and attach it as JavaScript:
!function(f,b,e,v,n,t,s) {if(f.fbq)return;n=f.fbq=function(){n.callMethod? n.callMethod.apply(n,arguments):n.queue.push(arguments)}; if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0'; n.queue=[];t=b.createElement(e);t.async=!0; t.src=v;s=b.getElementsByTagName(e)[0]; s.parentNode.insertBefore(t,s)}(window, document,'script', 'https://connect.facebook.net/en_US/fbevents.js'); fbq('init','id123'); fbq('track','PageView');Note that these samples don't include a live ID.