To get a larger sample size I also reduced the requirements from a 10-day high and low to a 7-day high and low. Those results are below. (Click table to enlarge.)
These results suggest more downside, especially over the next 2-4 days.
For more discussion on big drops from highs you may want to review this former study.
P.S. I just noticed that Dr. Brett also looked at the 10-day high to 10-day low move this morning. See what he has to say here.