Quote from YeahIknow:
Has this happened to anyone else? Can they do this?
yes & yes & probably happened to a couple 100/1,000? people on this site, and 10,000s out there, welcome on board

suggestions, let me try to summarize what i've learnt after 6 mths on ET:
- simplest and safest seems to be: forget spot fx and trade exchange-traded cme efx / eurexus fx products instead, via interactivebrokers.com aka IB or any other futures broker of yr choice (xpresstrade.com ?)
- now if u want to continue on the fx spot trading route:
. preferably always use min. 2 brokers / ECNs (multi-dealer platforms) and hide your trading pattern as much as u can (hedge on the other platform and unwind on both 1hr later... may cost u spread, but much less to no aggro like above-described from yr broker(s) )
. if u use an ECN-type platform (unless u r trading a pair for which there happens to be only one liquidity provider... always worth asking/checking..), a dealer can't penalize u for hitting him in fast mkts since you'll exit yr trade at the 'best available' price anyway, therefore what happened to you at fxcm wld not happen... still good to have a 2nd broker / ECN acct elsewhere (in case the other goes down temporarily or whatever... costs more K but thats peace of mind...)
. reputed "tight spreads" single-dealer brokers: oanda.com , seems if u wanted to go with only 1 (single-dealer) broker to limit the hassle, this shld be the one...
- liveable (i.e. some people incl yrs truly did get screw*d badly occasionally, but...) "fixed spreads... ahemmm" single-dealer brokers: ac-markets.com , forex.com , saxobank.com , ifxmarkets.com
- reputed ECN model type platform: interactivebrokers.com, hotspotfx.com , currenex via fxcmpro.com (yeah, fxcm again... i use them, so far no complaints), there's been mention of coesfx.com , fxdd.com , interbankfx.com and a couple others... run a search on ecns, u'll find them
as i'm sure u'll be aware, the above is totally incomplete and am sure u'll get more answers as a result and people may give me some grief over naming / not naming this or that broker / ECN but... hope i didn't confuse the hell out of u... hope it helps a bit...
going to bed now, good luck with yr trading!
cheerio