It looks like the Dow is in a progressive sawtooth crash, and with trade-war fears not likely to abate anytime soon, who knows how low this can go. Here I show shorter and longer-term support (defined as a linear trend touching lowest lows). 2017 seems to mark the onset of a parabolic movement that's now crashing down, so it's not beyond the realm that the parabolic bubble will burst, taking the Dow down to its 2009 - 2015 support level. The DJI has already lost all of the bubble's 2018 growth, and then some.
The 2017 parabolic movement may have all been anticipation of economic stimulus under Trump's anticipated pro-business policies. But counting one's chickens before they hatch is not a sure thing. So we may be seeing estimate corrections upon realization that Trump is a mixed bag. Even if his trade-war plans bring future growth to US businesses, in the interim it may have non-trivial consequences for equities.