You can view the actual code (TradeStation 2000i) and original posting for the Grand Slam 2 here.
Note that I published the system back in 2008 and, somewhat amazingly those original settings are still producing respectable returns. The current settings are tweaked a bit but the basic nut is the same.
If you would like to receive (via email) the full performance report of the GS2 system for SPY and TLT in Excel format send me an email at ETFMosaic@aol.com. Each report is 15 pages and covers most of the commonly asked questions about system robustness. One thing I like about the system is the equal number of long and short trades...this tends to indicate a robustness in variable market conditions and not just a system for Bull or Bear markets.
As with the MRSI and DB systems SITUATIONS will only post Long signals for the GS2.