Recently, I’ve seen many newcomers in the community confused by slippage issues, so I think it’s necessary to have a good discussion on this topic.

Slippage is actually the difference between the price you see when placing an order and the actual price at which the trade is executed. It sounds simple, but this difference can directly eat into your profits, especially during highly volatile market conditions.

Why does slippage occur? There are mainly a few reasons. First is liquidity issues—if the trading pair lacks sufficient liquidity and the order book isn’t deep enough, your large order may have to be filled at multiple price levels, increasing the overall cost. Second is price volatility—crypto markets change rapidly, and within the seconds from clicking to place an order to the actual execution, the price may have moved significantly. Another reason is large trading volume—big orders in markets with limited liquidity can trigger price swings, causing different parts of the order to be filled at different prices.

There are two types of slippage. Positive slippage means the execution price is better than expected—for example, you want to buy but end up buying at a lower price—that’s obviously good, but it’s not common. Negative slippage is the norm, meaning you either buy at a higher price or sell at a lower price, directly increasing your trading costs.

How much does this affect traders? Especially arbitrageurs, who profit from tiny price differences between exchanges—just a small amount of slippage can wipe out their entire profit or even cause losses. In volatile markets, sudden news or large transfers can trigger sharp price movements, making your order price and execution price vastly different.

How can you reduce the impact of slippage? I’ve summarized a few practical methods. First, choose trading pairs with deep liquidity—major coins usually have better liquidity, and their prices are closer to expectations. Second, set slippage limits on decentralized exchanges (DEXs)—if the price deviates beyond your set range, the trade won’t execute, which is a good risk control measure. Third, avoid high-volatility periods, such as during major news releases, market openings, or sudden surges or drops—these times are when slippage tends to spike. Fourth, split large orders into smaller chunks and execute them gradually—this can significantly reduce market impact. Lastly, select a reliable trading platform—some exchanges have more efficient matching engines, resulting in more stable slippage performance.

Overall, understanding the mechanism and impact of slippage, and adjusting your strategies flexibly according to market conditions, are key to minimizing losses in trading.