ERA said:switching long, short, long, short to realize loads of traders are making multiple scalp trades aiming for small pips every day. And the dealers are getting a spread on each one of those.
which is o.k to a point (for the shops), whilst the punters are trading small size.....start cranking up the bucks, with a (reasonably) consistantly successful strat & they begin to fidget uncomfortably in their seats
even the one's who barely whisper their approval of so called 'scalpers' will inform you that they can (& undoubtedly do) discourage/unsettle their grinning customer if that customers "trading style" conflicts with the shops interests.........in other words "whoa there Joe, time to change horses or we'll have to stick the brakes on"