Agree, 200dma is essential to long term investing. It is saying stay long next 10 weeks, at which point it will need to stay above 2900 to continue going up.
Which means we most likely go up or sideways into early January, then the bear starts in earnest.
Just a theory. I graduated magna cum laude in micro biology from UCSD, which means I worked very hard to get good grades, and am a trained scientist. One makes a theory, sets up an experiment to test it, and then sees if it is right or not.
AM not super bearish into early January, but with Brexit and china tariffs, anything is possible.