Thanks for the feedback fellas.
Tradertim,you bring up some interesting points,you say when prices get to the 2nd or 3rd band it can take a long time before they reverse.How long is a"long time"?If it is,say,a month or so then it would be suitable for doing credit spreads,particularly if the prices do indeed reverse 98 of the time.Anyway I have browsed their site and find it a bit curious that everyone who has sent a testimonial have also given their email address.Interesting!!!