I have had a retail FX trading account (no need to name the firm) and was comparing the interbank quotes I have to the retail firm's quotes and noticed the retail quotes weren't quite right. I called the brokerage firm and asked them what they base their quotes off of because clearly they aren't based on the actual market and asked if they run some kind of algorithm that bases their quotes on where they believe the market will be, not what it actually is and the rep replied yes, that's how their system works. I was actually quite shocked to hear this so between the fixed spreads and the fantasy market the retail firms create I find it to be a miracle these firms even stay in business. Are all FX traders aware of this????