Whenever you have highly dynamic elements on your pages you will soon notice that they give you false positives regularly. For example you've added Disqus widget or you have a slider or a video that autoplays.
For this we have developed capabilities of masking (filling region with green color) or excluding (completely removing from DOM) elements. You can find these settings under Modify section of the project's settings.
Here is an original screenshot (http://booster.diffy.website)
You can see a dynamic block of stock trading from TradingView (graphs in the sidebar).
Here is screenshot after masking
Here is screenshot after excluding
You will need to use CSS selectors (same as jQuery uses) to let system know what elements to mask or exclude.
We highly recommend you check this functionality out. Specially if you have sliders, ads, live chats or any other dynamic content you would like to get rid of.