So, this happened... The nearby screenshot is from yesterday's Market Wrap (00:12 mark), repeating a warning that I had highlighted intraday: A blip-up had reversed down. Nothing too nefarious in that, except for its location, which was at the 19,400 prior high. And its reaction down was hugging an uptrending pivotal support a little too tightly. For a little too long. I added the parallel uptrending pivotal support, and then added a sell signal to it. A very big sell signal, stretching back down to 17,100. That was optimistic. Just 12 hours later a $3,000 collapse touched 16,555. That's the next chart. I had not intended for the arrow to define the actual path down, and now it is hidden by price bars. Zerohedge has comprehensive reporting on it here. Essentially, large "whales" were noted transferring their large "wallets" to exchanges, which suggested that big selling was imminent. Already vulnerable according to the setup I had described, the fear became self-fulfilling. And actual whales selling probably helped. So, now what. That's a lot of selling pressure in a short time -- a very short time, retracing less than 10 days of gains. The big price change inhibits sellers. The very recent memory of 20,000 will eventually start attracting buyers. The Testing 17,100 has involved a Nov 16 sleeper low at 16,555, and basing here could launch a bounce to 18,500+. Otherwise, the next lower support is at 16,030, also last seen 10 days ago.  Then 13,800... Happy Thanksgiving!