Invisibly executing trades? I'd be curious how that could be accomplished .

Aside from the two trade listings in Excel and text format, you can see all trades in the message window when you're in [Trade] mode. Look for LOGFILE, VERBOSE etc. in the manual about how to set up the trade logs. You can also access the complete trade list by script or with an external DLL, using the for_all_trades macro defined in trading.h.

http://zorro-trader.com/manual/en/mode.htm

Note that the Excel trade log is a perpetual file, i.e. all executed trades are added to it. You must delete trades manually for removing them from that log. It's meant for your tax declaration.