Prime of prime marketing: how to read it without getting hypnotised

[FXS London Scalper]

"Tier-1 liquidity via our prime of prime." "Institutional-grade execution." "Deep liquidity from 25 banks." These lines appear on many broker sites. What do they actually mean for a retail scalper?

A prime of prime (PoP) is a firm that has a relationship with a prime broker and resells access to smaller brokers. So your broker connects to the PoP, the PoP connects to its LPs, and your order may or may not go out to them depending on the broker's model.

Questions that cut through the marketing:

1. Is my order passed on, or does the broker internalise it and only hedge its net exposure? Many do the second, which is legal and common.
2. What's the minimum size passed to the LP? Small orders are often never passed on at all.
3. How many LPs, actually, and does the number matter if aggregation is done well?
4. Can I get last-look or rejection statistics?

In the end, the only proof is your own fills: slippage both ways, rejection rate, speed during news. A broker with three good LPs can beat one boasting twenty-five.

I'd treat any liquidity claim like a menu photo: it might look like that, but you judge the meal. Has anyone ever got a straight answer from a broker about their order routing?