Slippage in Forex: Why the Price Moves Away

Slippage is the difference between the price you saw and the price at which your order actually filled. It is a common phenomenon, especially in a fast market, and it cannot be eliminated entirely, but you can understand when it is unavoidable and when it signals a bad broker. For an active trader, controlling slippage directly affects the result, because it accumulates with every trade.

Why the price "moves away"

The market moves continuously. While your order is on its way to filling (fractions of a second), price can change, and you get the nearest available one. On news and in low liquidity the gap is larger: counter-orders are scarce, and the order fills at a worse price. This is slippage. It is especially noticeable with market orders and stop orders, which fill "at market" the moment they trigger, not at a fixed price.

A requote is something different

A requote is when the broker does not fill an order at the requested price and offers a new one that you must confirm. Unlike slippage (the order is filled, but at a different price), with a requote the fill is postponed. Frequent requotes in a calm market are a bad sign: a normal broker with market execution almost never has them. Requotes are more common with brokers whose execution model lets a dealer "re-ask" the price, which creates delays and a potential conflict of interest.

When it is normal and when it is not

Small slippage on the release of the NFP, a central bank meeting, or another important event is natural: at that moment the market is ragged and liquidity drops. Expecting flawless execution at the moment of an important data release is naive. But systematic slippage always against the client and during ordinary calm hours is a reason to scrutinize the broker. Honest execution produces slippage in both directions: sometimes slightly worse, sometimes slightly better than expected. If it is consistently to the negative, that is a sign of a dishonest model.

Slippage and the stop-loss

It is especially important to understand slippage in the context of the stop-loss. A stop order triggers as a market order the moment the level is reached, so in a fast market or through a gap it can fill noticeably worse than the specified price, meaning the real loss turns out larger than planned. This is not a failure of the stop but a consequence of how it works. You need to account for it when trading volatile instruments and when carrying positions through news and weekends.

How to reduce slippage

A few practical techniques. Do not enter with a market order right on the release of important news, where slippage is at its maximum. Use limit orders where a specific price matters (a limit will either fill at your price or not at all, but never at a worse one). Trade liquid pairs during active sessions, where counter-orders are plentiful. Choose a broker with transparent market execution and test execution quality in practice. Slippage cannot be removed entirely, it is part of the market's mechanics, but keeping it under control is quite realistic, and on short strategies it directly affects profitability. Understanding when slippage is unavoidable and when it is a signal of a problem helps both cut costs and spot a dishonest broker in time.

This material is for educational purposes and is not individual investment advice.