Ah hah! Just as I suspected. It's a graph! In all seriousness, great work. Can you break down the data for one day? I think there's an AH rush hour. (or several)
That's really interesting. I was thinking, just last week, of a market analysis tool that shows you current and historical data on the prices of various things. That would help both sellers and buyers make better pricing decisions. Then you could have automated sellers and buyers that put good on auctions, or buy them, at optimal times during the week.
Then I can set myself up as an automated trading service and make zillions in the process. Do you think the devs will bail me out if my algorithm screws up?