Happy to help Achmidius,
There is a good list of recommended brokers on the blog btw so I would recommend checking them out.
I like IC markets as easy to open lots of demo accounts and they have tight spreads in raw account but there’s plenty good brokers out there.
Dukascopy is good but their demo accounts expire after 2 weeks which can be limiting, I have a non expiring one that I got when I opened a live account but usually they expire.
I would definitely recommend trying a couple of other brokers out for demo trading. If you follow what I suggested in previous post then as long as you have checked that the strategy is working similarly on that broker over a sensible period then all good to trade on it (demo first of course, don’t rush into live trading until have several positive months of demo trading under your belt)