Hey Boyan,
So, about Grid Machine, you can also trade it on EURUSD as well on H1 timeframe but should be working on different other pairs but I cannot say for sure how it can perform on them.
About the EA, it is best to use a different robot that is probably not used much on Darwinex because if you use Grid Machine and they understand that there are a lot of accounts with the same robot, they might not allow us both to withdraw any payouts. In this case, to make it individual, make sure to just use a different robot.
Hope this helps!
Kind Regards,
Nikos