# What is a "sandwich attack," and how can I check if I’ve been attacked?

A sandwich bot attack is a common malicious trading tactic that occurs on-chain. It typically involves high-frequency trading bots (often called sandwich bots) that quickly buy or sell tokens to capitalize on price discrepancies. These bots may engage in front-running transactions or manipulate gas fees to complete transactions before regular users, allowing them to profit from price changes.You might be a victim of a sandwich bot attack if you notice the following signs:

1. **Significant Price Difference:** The actual price of your transaction differs greatly from the price just a second earlier.
2. **Coinciding Transactions:** There’s a buy and a sell transaction right before and after your trade, both originating from the same address.
3. **Bot Mark:** Your transaction address is marked as a bot on DEXTOOLS.
4. **Typical Trade Amounts:** The amounts being traded by the bot usually fall between $6,000 and $9,000.
5. **Your Transaction Type:** Your transaction is a buy order.

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If your trade doesn’t meet these criteria, it's likely that you weren't attacked by a sandwich bot, but rather that someone else made a trade ahead of you, driving the price up.To protect yourself from these attacks, you can activate the "MEV protection" in DEXX, which can help prevent this risk.
