First of all, thanks for sharing--this is an interesting idea. I have a question, though...

The last 3 months have been rangebound and choppy--very good conditions for Martingale/grid type systems. However, almost every pair made large moves (with almost no retracements) at some point in 2008. I don't have a chart in front of me, but I believe the EURCHF made such moves in September/October 2008 and December 2007. Have you manually backtested in these periods?