Is it possible to test a strategy in test mode while Zorro is also running a strategy? Or will it "suspend" the strategy while the test is running and then you need to restart the strategy?

If this is the case, what about open positions that don't have a stop loss? I'm demoing Z12 and the first trade it opened had a stop loss, but yesterday it opened a bunch of trades without any stop losses visible.

Also, why would Z12, for example, take different trades on different accounts?

Thanks!

You can test a strategy anytime by just starting a second Zorro.

The Z systems behave slightly different for every user. There are several reasons for that that are explained in more detail in the manual.