That chart looks like it's leveling off. They don't say anything about that, and I believe that is the most significant attribute of that chart. They are, of course, trying to suggest behind their techno-babble that the market will keep going up. No surprise they dragged this little gem out to counteract the fear created in the recent correction.

A much more interesting analysis could be had from speculating on why it's leveling off. What happens when there's no more debt to buy?