Fluctuating Results

If you notice that you're that certain metrics fluctuate from time to time it could be for several reasons:

Fully Loaded and Page Load times

You may notice that your pages tests show very different full loaded times. Fully Loaded is calculated by waiting for 5 seconds after the page is loaded and interactive and checking if there are any further requests made by the browser. It may be that your site is still making requests in this time which causes the metric to be higher. This could be for example because of a third-party script which you are including in your site such a live chat widget which makes requests to a separate service intermittently.

Prevent Fluctuations

To prevent this scenario, you could add a URL param to your page and disable the chat widget or other scripts, if it is present, to stop the requests it is making while your test is being undertaken.

A better solution is to add a script to your test which blocks requests that are causing problems.