From the link:
All sell signals remain in place – as usual this is a market can can go down as long as it wants and turn up any time. That sharp drop in the calls and the rise in the puts in the last twenty minutes of the day on the 10-minute charts below may hint there is more downside to come right away tomorrow but news, like a trade deal with China, can intervene.
This is a dangerous time for short-term traders. On the longer term, every bear market begins (or resumes) on a single down day and that day was six days ago to start this current slide.
CALLS AND PUTS ON A NOT GOOD SIDEWAYS DAY