well the best practice, would be to choose one that has adequate lines with various banks internationally. in this way he/she can quote to you competitive rates. especially when it comes to giving orders for a later time (for instance when asia market opens, of europe market opens and u r located in usa) then the broker must again have direct lines (not via another broker) so that your order can be activated asap
i would reccomend to have a look at a known investment banks that has branches worlwide.
well the best practice, would be to choose one that has adequate lines with various banks internationally. in this way he/she can quote to you competitive rates. especially when it comes to giving orders for a later time (for instance when asia market opens, of europe market opens and u r located in usa) then the broker must again have direct lines (not via another broker) so that your order can be activated asap
i would reccomend to have a look at a known investment banks that has branches worlwide.