What is re-quoting and why do some brokers re-quote orders?

Re‑quoting occurs when a broker refuses to fill your order at the requested price and instead offers a new price, asking you to accept or reject it. This usually happens in fast markets when prices move between the moment you click and the moment the broker processes the order. Market‑maker brokers are more likely to use re‑quotes, since they must decide whether to take the opposite side of your trade at the quoted price. In contrast, many STP and ECN brokers advertise “no re‑quotes” and instead fill orders at the best available market price, causing slippage rather than a pop‑up. Occasional re‑quotes in extreme volatility can be normal, but frequent re‑quoting in calm conditions may indicate poor execution or unfavorable dealing practices.