The grey extended-hours bands on the charts are in the wrong place. They go from 3 pm ET to 9:30 am ET. But the market doesn't close until 4 pm. Edit: I'm looking at it again, and it turns out the bands are kind of random, depending on the zoom (using scroll-wheel). Sometimes they go 3-9:30, sometimes they go 4-3 (leaving only 3-4 clear), but so far I haven't seen them go 4-9:30 like they're supposed to.