Real-time direct order placement through brokerage interface is not available in the demo version for obvious reason.
One thing you can do is to enable the advance options in the trade simulator so that your system will be subjected to more restrictions on its real-time orders. We were told that this testing method can reflect a lot of weaknesses of a model.
If you have an account with MB Trading or IB, there the demo connection to both data sources will enable you to utilize their real-time streaming data in NeoTicker across the charts, quotes, and the trade simulator.