i think Spread is the most thing for which most of the brokers do not allow scalping.Some pairs have 3pips as spread and if you make 3pip profit the broker might go for loss. choose a broker who has low spread and which allows scalping. and A typical scalper will open and close tens, and in some cases, more than a hundred .... But when, for whatever reason (often a news shock, but we don't concern .... some brokers quite simply refuse to allow scalping techniques for clients.