Hey Asser,
I am glad to hear from you. Yes, the premium data is the data from Dukascopy. It loads automatically in EA Studio which is pretty cool.
However, it is not limited to 50,000. You can increase the number of bars if you go to Data – Data Horizon – Maximum Data bars,
Regarding the symbol settings to use the Premium data for 2 different brokers, I don’t think that would be possible.
We have two options with the symbol settings – to use the original settings or to set custom settings.
So if you use the Premium data and you change any of the symbols with custom values, you are changing it for the Premium data in general.
But what you say is interesting and I will discuss it with Mr. Popov (the developer of EA Studio and the Premium data) and I will let you know if something like that might be done.