What Is Slippage Tolerance?
Slippage tolerance is the maximum price deviation you are willing to accept when executing a trade. If you set a 0.5% slippage tolerance on a swap, the transaction will revert (fail) if the execution price differs from the quoted price by more than 0.5%. This protects against unfavorable fills during volatile conditions.
How Slippage Tolerance Works
In DeFi, slippage tolerance is explicitly set on every swap. Too tight (e.g., 0.1%) and transactions frequently fail during normal volatility. Too loose (e.g., 5%) and you become vulnerable to sandwich attacks where MEV bots front-run your trade. The optimal setting depends on the token liquidity, current volatility, and trade size relative to pool depth.
Why It Matters for Traders
Setting appropriate slippage tolerance is critical for both CEX and DEX trading. For major pairs on liquid CEXs, 0.1-0.3% is typical. For DEX swaps of large-cap tokens, 0.5-1% is reasonable. For small-cap or low-liquidity tokens, 2-5% may be necessary but dramatically increases vulnerability to MEV exploitation. Always check pool depth before large DEX trades.