The main advantage of using STP add-on is copying orders from MT4 to MT4, or(and) to Currenex, LMax, ADSS... with no latency or with outrunning. Order can be opened on slave earlier then on slave. STP add-on will be very usefull, if you would like to copy trades to non MT4 brokers (Currenex, DukasCopy, LMax, ADSS, Fortex (Marex), MIG Bank, CitiFX, SwissCode) via FIX API add-on. Most probably the trades will be executed faster on non MT4 slave than on master account. Read more on our blog: http://powertradecopier.com