Why does slippage happen? Is this a bug?
By: WEEX
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When trading spot or futures products, you may notice that your final execution price is different from the price you expected. Rest assured that this is not a system error or platform bug. It is a normal market phenomenon known as "slippage", which occurs across all global cryptocurrency exchanges.

What is slippage?

Slippage is the difference between the price you expect and the price at which your order is actually filled.

For example, if you place a market buy order when BTC is trading at 94,000 USDT, but your order is filled at 94,050 USDT, the 50 USDT difference is called slippage.
 

Why does slippage happen?

1. Large orders fill across multiple price levels

  • Market orders fill at the best available price first
  • If there is not enough liquidity at one price level, the remaining order fills at the next available prices
  • This can increase your average buy price or lower your average sell price

2. Prices move while your order is being processed

  • A slight delay exists between placing and filling an order
  • The market price may move during this time
  • Higher volatility can lead to larger price differences

When is slippage most significant?

Factor

Slippage level

High volatility or major market news

⚠️ Significant

Large order size filling across multiple price levels

⚠️ Significant

Low-liquidity altcoins

⚠️ Moderate

Small market orders on major tokens

✅ Minimal

How to minimize the impact of slippage?

  1. Enable WEEX guaranteed price: After enabling this feature, your orders will be executed at the trigger price with no slippage risk. This feature is available as a paid service, and VIP users receive a limited number of free uses each day.
  2. Use limit orders: Limit orders allow you to specify your execution price and avoid sudden price changes caused by market volatility. However, your order may not be filled if the market moves too quickly.
  3. Use BBO orders: BBO orders use the current best available market price to place a limit order, helping balance execution speed and price accuracy.
  4. Be cautious during extreme volatility: Major news events and economic data releases can cause sharp market swings. During these periods, try to avoid blindly chasing rapid price moves with market orders.
  5. Split large orders into smaller trades: Breaking large positions into multiple smaller orders can help reduce the impact of filling across multiple price levels.

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⚠️ Slippage is a normal part of how markets work. Choosing the right order type and trading strategy can help reduce trading costs and manage slippage risk more effectively.

Risk disclaimer: Futures trading involves high risk and may result in the loss of your entire principal. This content is for educational purposes only and doesn't constitute investment advice. Trade responsibly and make decisions based on your own risk tolerance after fully understanding the risks involved.
 

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    Why does slippage happen? Is this a bug? | WEEX Help Center