Every system can have multiple trades per day. If you were to trade only the NQ system, understand it is comprised of two combined subsystems and traded from one chart. The Subsystems consist of one long system and one Short system creating a market-neutral balance. You can and will have multiple trades per day, and you can have more than 1 Long Subsystem trade simultaneously.
There can be multiple trades in a day, and the average winning trade is 0.92% (this can be skewed heavily by strong winning outliers, fat tails are expected with day trades). The number of trades in a single day, long or short, is 5. We have had four trades per day on many occasions in testing as well.