[dharmon]

I think we are saying the same thing, but I am just elaborating on what "signal detection" means. The usual approaches at worst just don't work, and at best don't scale very well.

I am saying that (I believe) RenTech has taken a very holistic approach to signal detection and maintenance, rather than the very academic approach that used to be the norm. And even if a signal is found, they have to be weaved into the trading system gradually, and eventually removed when they no longer work. This is a very challenging problem and they are very good at it.