re: Rydex 10:45 pricing.....yes, I don't believe Rydex provides such a history. I have asked, and they say no...perhaps that might change if there was enough interest. They must have an archive of that data.
Practically speaking..I thought the morning trades on the 2X funds was going to be a bonanza that I would use often. In reality, the morning madness in the first hour of trading is often more confusing as to actual market direction than simply using the eod numbers. Rydex allows trades until 3:55..and I don't notice much direction change in the last 10 minutes or so...
It seems that the CSGCOS system can be followed eod, by simply looking at the signals, at say about 3:30..then make any required trade about 3:50..and kick back with a Dr. Pepper.