There are two kinds of broker in forex market. One is dealing desk and one is non dealing desk. Dealing desk broker execute your request with re-quote and dismissal. That is chafing for a trader. That is the reason I pick a non dealing broker called XeroMarkets. it execute my request quick without re-quote and dismissal. Those are most basic thing for my scalping. They additionally are giving me low tight spread, swap and commission free account and some more.