That was my first thought when I looked at the chart from Maximoney until I realised that it was very short term. It is the little rise starting in November 2005 that he is showing the volume spikes for and not the rise commencing 2002/2003 like I first though he was showing. I am sure you can check back through your data for the last 6 weeks to see what the daily volumes were - can you confirm the volume spikes in the first couple of days of November 2005? Do they exist in your data providers data?