Slippage: What It Is in Simple Terms

Slippage is the difference between the price you saw when sending an order and the price at which it actually executed. While the order travels to execution (fractions of a second), the market moves, and you get the nearest available price. The phenomenon is common and cannot be eliminated entirely, but it is important to understand when it is inevitable and when it signals a dishonest broker.

Why Slippage Occurs

The market moves continuously, and executing an order takes time. Slippage shows up most on the release of important news and in low liquidity: there are few opposing orders, and a market order executes at a noticeably worse price. Market orders and stop orders, which execute at market the moment they trigger, are especially prone to it. On gaps (price breaks) slippage can be significant.

Slippage and the Stop-Loss

An important nuance: a stop-loss triggers as a market order the moment the level is reached, so in a fast market or through a gap it can execute worse than the specified price, and the real loss turns out larger than planned. This is not a malfunction of the stop but a consequence of how it works. It must be accounted for when trading volatile instruments and when carrying positions through news and weekends, where the risk of slippage through the stop is highest.

When It Is Normal

A small amount of slippage on the release of NFP, a central bank meeting, or another important event is natural: the market is choppy at that moment and liquidity drops. Expecting perfect execution at the moment important data is published is naive. Honest execution produces slippage in both directions: sometimes a bit worse, sometimes a bit better than expected. This is a sign of normal market mechanics, not a problem.

When It Signals a Problem

But systematic slippage always against the client and during ordinary quiet hours is a worrying sign of a dishonest broker. If it is consistently to the negative, especially on profitable trades, this points to an execution model working against you. In the same vein are frequent requotes in a quiet market. An honest broker with market execution produces slippage symmetrically, not only in its own favor.

How to Reduce Slippage

A few techniques. Do not enter with a market order right on the release of important news. Use limit orders where price matters (a limit fills at your price or not at all, but never at a worse one). Trade liquid pairs during active sessions. Account for the risk of slippage through the stop when carrying positions. Choose a broker with transparent market execution and test it in practice. You cannot remove slippage entirely, since it is part of market mechanics, but keeping it under control is realistic. Understanding when slippage is inevitable and when it signals dishonesty helps you both reduce costs and recognize a problematic broker in time.

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