I would say NO, don't mix them. That is likely to be a headache and it will make it hard to interpret your data. I have been using Tradervue for quite a while and have more than one account for different purposes: one for live trading, one for sim, and one for occasional swing trades. Also, with Tradervue you can track your performance over months and years and sim trades would just mess that up. Even when keeping a journal in OneNote or a similar program, I think it makes sense to keep them separate because live and sim are different experiences and can be quite different psychologically.

Thank you!

Thanks man, I appreciate your answer.

I have used both DAS and IB TWS. I used DAS for a few months and thought it was great. I went back to TWS to save money and I am able to trade more or less the same way I was on DAS, it's just a bit more awkward with the charts and Level 2. I combine it with TOS which I use just for charting. For me, it's worth it for now to save the money in my monthly budget, but I'll get back to DAS at some point in the future.