RE:volumeThis from a book ive been using for years, this amount was staggering, they suggest that up to 20% of days total volume could be traded in last few minutes, this was almost double the day.
Last minute volume trading, can be attributed to certain kinds of traders closing out their position before the end of the day. For example, if you don't want to take the risk a large price movement at the start of the next day affecting you, you would need to completely close your position.
Maybe tomorrow, GLTAL