Tomorrow is a full-fledged, abysmal volume day at the NYSE. The CME has a shortened floor close for commodities, Globex closes at regular times like week-end.
i highly doubt the volume will be crap in the last hour or so. there will be some very good imbalances and there should be some big money moving stuff around late.
just open them up 24/5 like the forex, these 6.5 hour trading days are so old school. Its not 1983 its 2007.