yes, fxprimus got problem with certain EAs or Indicators running real time connection and linking with other websites.
so just do double check with your tools whether it has such functions with your EAs or Indicators.
it seems that they are trying not to allow us to do so, but sometimes, it's hooked up, or sometimes, we got 'no connection' alerts! i'm still discussing it with fxprimus, but still no solution with that.
IMHO, this broker is still 'a baby broker' and they still have to do a lot of home work to make their MT4 platform running well, furthermore it's true, that they are urgently need to refine or tune up their payment system.
But overall, after thorough examinations with their general appearance and business characters as well as from technical side, I should say that this broker is still honest and fair enough, if we compare it with others.
And, i'm fully agree with adamp, so, it's still highly recommended level of ratings, especially from me.