Signs a broker is warehousing the flow

[Amanhasnoname]

A-book brokers pass trades to liquidity providers. B-book brokers keep them. Most retail brokers do some of each, and the sorting can be selective.

Scalpers who win consistently are the type most likely to be moved to the A-book, or restricted, because the broker would otherwise lose money against them. That sorting is rarely announced.

There are quiet signs. Fills that degrade after a profitable month. Spreads that look slightly wider only on the account being tested compared to a friend's account on the same broker. Sudden 'technical' disconnects on larger winning positions.

None of these is proof alone. Together they form a pattern worth taking seriously.

The practical response is not outrage but information. Run a small test account at a second broker with the same strategy and compare results trade by trade. If the second broker consistently fills better, the answer is clear.

It also helps to read the execution policy page, the one nobody opens. It often states how flow is handled in plain language.

Has a broker's behavior ever changed noticeably once the account started making money?