ES dropped 20 points in overnight trading as a result of the latest trauma at the Turkey-Syria border (Turkey shot down a Russian fighter jet).
However the ES quickly found support within the first hour after the market opened. During the day energy stocks bounced, and the ES finally recovered all the loss and made a small gain on the closing.
Today there are lots of economic reports in the morning session. The volatility will remain high like yesterday. But buying on dips will likely continue.