Agree 100% on Citi Velocity. I used it as an auxiliary platform while at the prop shop as a fall back in case the proprietary platform went down. Citi puts each Velocity customer on a spread schedule (gold, silver, bronze I believe) depending on what they thought they could get away with - in other words, how savvy a client you were considered (i.e. the spread they showed in 25 GBP to the CB of Russia would be tighter than what they showed a retail clown like myself). In any case, even if I preferred Velocity over IB (which I do not), you can't gain access unless you margin a large sum as in the prime of prime example. I usually do not have position sizes in excess of $8 million notional and the majority of the time I click in 4 units so a $250k account provides enough margin for my needs. If I was still market making at a bank and needed to see a demand price in 100-200 euros or something, then Velocity would be ok and maybe even preferred over IB. But for spreads in 5-8 units, IB (with 12-16 LPs) is exponentially better than Velocity which shows solely Citi e-liquidity.