I've been working on a Flash charting app for Mt. Gox the past few days, and of course now it's useless
But I quickly hooked it up to the Tradehill API, and it works (although there hasn't been much trading in the past few hours).http://www.composure1.com/BitGraph.html
You can change the timescale to be 48, 24, 12, 4, or 1 hours, or 15 minutes.
You can change the scaling as well.
The chart shows *every trade made* and on the 1 hour and 15 minute scales the radius of the circle shows the volume traded.
It polls for new ticker data every 15 seconds, and new trade history data every minute.
I am working on the market depth charts, and I will actually be taking a snapshot of the depth every 5 minutes, so you will be able to view historical depth charts, as well as total supply & demand at any given moment. The volume-weighted average buyers' price and sellers' price will be displayed also (hopefully I will have this all out later this week).
Questions, comments, and suggestions are welcome.