Thought I was done for the evening but I have to look at one more chart with one more crazy idea and look what I see.
Now a set of four is not a compelling correlation but a set of every time? Every time the INDU's ATR dips below 80 the market goes down in a day or two. None of the other indices seems to have that marked a relationship to the ATR.
Anyway - you see where the ATR is presently and you also see that the INDU keeps pumping out narrow range days. I'd say between these two items we are due for a real drop. At least to the 21 EMA if not a little farther.