The first step in accessing the, "Cumulative Delta" study is to pull up the, "All Studies" menu. You can pull up all the studies by holding, "CTRL" and pressing, “T”.
When you push “CTRL+T” you will see the below pop up window.
The next step in pulling up the Cumulative Delta study is by typing in "Cumulative Delta" in the search bar then clicking on it when it comes up then pressing "OK". The picture below can provide detail on what this should look like.
You should now see the study appear in its own window below your charts. See picture below for clarity on this.