Quote from Chood:
From the definition at the url surfer provides, "Today's instant price quotes and executions have eliminated the original scheme . . ." I believe that refers to stocks only and the instant price reporting of exchange-traded equities. If so, the difference between those characteristics of equities trading and the currency quotes offered by fx retailers to their customers could NOT be greater. If anything, the definition -- by all means read it in full -- clinches the points made by JimRockford.
I think that what Chood is trying to say is that equity quotes are true bids, asks, and trade prices generated by a competitive marketplace, with huge numbers of buyers and sellers; but FX bucketshop quotes are fabricated, constructed, and manipulated, not by a competitive marketplace of countless participants, but by one single "broker" who profits when you lose. Equity quotes are generally executable, as mandated by law; but FX bucketshops are unregulated, and so they get away with doing things not tolerated elsewhere; they erect many obstacles and dirty tricks to prevent you from getting executions of their quotes, for example, requoting, manual quoting, freezing, rules against picking, rules against high-frequency trading, etc., etc., etc.
FX bucketshops can move or vibrate their quotes, causing your stops to trigger when they should not; but if you try to execute against the same quotes which are used to run stops, you will face many obstacles, because those quotes are not truly fully executable. It is extremely unfair to run stops by manipulating quotes which are not fully executable. This allows the FX bucketshops to vibrate their quotes, up and down, so as to increase the chance of running your stops, while at the same time, they can avoid being held responsible for honoring those vibrating quotes when customers try to execute against them. Customers will experience freezing, requoting, manual quoting, or be told that they cannot trade so hi-frequency, or cannot engage in "picking", or cannot arbitrage quotes between different bucketshops, etc., etc., etc.