Quote from Chood:
P.S. I added that the add-ons (news, tools, etc.) the dealers offer on their platforms also are lures.
Transactions costs are hugely lower with futures, by a factor as much as ten in my experience. Next, consider what "liquidity" means. With a dealer, you have NO liquidity. The dealer is your single source for entry and exit, with your menu of choices at all times dictated by the quotes the dealer makes for you (or refuses to make). That explains platforms frozen or blanked at news, or limit orders dishonored, and spikes run to stops. Obviously, those results come not from access to some titanic river of globalized forex transactions, or even from a modest confluence of multiple streams of buyers and sellers.
Your claims are factually incorrect. Spot fx transaction costs are very competitive compared to futures if not better running as low as 1-2 pips on the majors. Liquidity is often guaranteed up to a certain amount (far in the millions at many dealers). The integrity issue remains as you state correctly; though good dealers are out there (including Oanda).
Next to this other advantages of spotFX to consider.
Choice from many pairs, not only USD crosses.
Very small account size possible.
Small increments, not only large lots.
Transaction cost are proportional to trade size (no commissions), you can be profitable at any size.
SpotFX dealers often offer an integrated package; charts, execution, news in one.
... what led you to choose Oanda over, say, Refco? Or whomever else you considered?