Yahoo's data appears to be messed up. Maybe screwed up the trade date when dealing with different timezone... or something. Here's another couple free charts you can verify against:

http://chartsrdc.cme.com:443/cs/charts.jsp?_quickEntry=6E1%2... http://www.dailyfx.com/charts/ChartStation.html

I realize the first is futures, but they match the spot market extremely well.