After installing FaceBook tracking pixels it is a good idea to check they are working correctly. Perhaps we have done it wrong or a developer has not added them where we wanted. So before you send traffic to a page you can ensure it has a FB Pixel installed by installing a add on to the Chrome browser. You can download Google Chrome here and the addon here.
Chrome is needed to use FB Power Editor so is worth installing and is always good to have a few browsers installed incase you want to check how your site looks via different platforms or perhaps you want to be logged into the same site via two accounts at the same time which you can do via installing multiple browsers.
to look at the icon to the far right of the address bar (looks like </> ) if you hover over this it will tell you if it picks anything up. If it is grey then it is not finding a successful FB pixel.
Hope you find this helpful