Price Impact in Crypto: Meaning vs Slippage
Price impact is how much your own trade moves a pool's price. See how it is calculated on an AMM, how it differs from slippage, and how to reduce it.
Price impact is the change in an asset's price caused by your own trade, measured as how far your average execution price sits from the market price before you traded. On a decentralized exchange it depends on one thing above all: how large your order is compared with the liquidity in the pool you trade against.
Price impact definition
Every automated market maker prices tokens from its reserves. When you buy a token, you remove it from the pool and add the other side, which makes the token you bought scarcer and therefore more expensive. Each additional unit you buy costs a little more than the last.
Price impact expresses that cost as a percentage. If a token trades at $3,000 before your order and your swap fills at an average of $3,030, your price impact is 1%. DEX interfaces usually display it next to the quote, often with a warning colour once it passes a few percent.
Price impact is not the same as slippage. Price impact is known before you sign, because it is calculated from the current pool. Slippage is the extra difference that appears if the pool changes before your transaction executes.
How price impact works
The classic constant-product AMM keeps the product of its two reserves fixed: x × y = k. A trade moves along that curve.
- You add tokens to one side of the pool, increasing x.
- To keep k constant, the pool must hold less of the other token, so y falls and you receive the difference.
- Because the curve bends, each extra unit of input buys less output. The bigger the trade relative to reserves, the more it bends against you.
A useful rule of thumb for constant-product pools: a trade worth about 1% of the pool's reserve on that side causes about 1% price impact, and 10% causes about 10%. Concentrated-liquidity DEXs change the picture, because liquidity can be packed tightly around the current price; trades inside a dense range have low impact, but impact can jump once a trade crosses into a thin range. Our CLMM guide covers that in detail.
Price impact example
A hypothetical constant-product pool holds 100 ETH and 300,000 USDC, so the spot price is 3,000 USDC per ETH and k = 30,000,000. Fees are ignored to keep the maths clean.
| You spend | New USDC reserve | New ETH reserve | ETH received | Average price | Price impact |
|---|---|---|---|---|---|
| 3,000 USDC | 303,000 | 99.0099 | 0.9901 | 3,030 | 1% |
| 30,000 USDC | 330,000 | 90.9091 | 9.0909 | 3,300 | 10% |
Ten times the order size produced ten times the price impact. The larger trade also left the pool's new spot price at about 3,630 USDC, 21% above where it started, which is the opening that arbitrageurs then close by selling ETH back into the pool.
Why price impact matters
- It is a real, immediate cost. A 2% price impact on a $10,000 trade is roughly $200 lost before fees.
- It reveals how deep a market really is. A token with a large market cap but a small pool can carry heavy price impact. Check pool depth, not just price charts; our Sui DEX comparison lays out where liquidity sits.
- It matters for liquidity providers too. The price moves that create price impact for traders are what shift a pool's balances and cause impermanent loss for LPs.
- It can be reduced. Splitting an order over time, using a DEX aggregator that routes across several pools, or choosing the deepest pool for the pair all lower price impact.
Price impact on JewelSwap
When JewelSwap farms swap or unwind positions, they trade through external DEX pools (AshSwap and xExchange on MultiversX, Cetus and Turbos on Sui), so pool depth on those venues determines the price impact of an exit. The deeper the pool behind a farm's tokens, the less an exit costs in price impact.
Related terms
- Slippage — the full gap between quoted and executed price.
- AMM (automated market maker) — the formula-based pools that create price impact.
- Liquidity pool — the reserves whose depth sets price impact.
- DEX aggregator — splits trades across pools to cut price impact.
- Sandwich attack — an attack that profits from the price impact of your trade.
Learn more on the JewelSwap blog
- Sui DEX comparison 2026 — compare liquidity depth across Sui exchanges before you trade.
- Impermanent loss explained — what price moves mean for the people supplying the pool.
- Concentrated liquidity (CLMM) explained — how liquidity ranges change price impact.
Frequently asked questions
What does price impact mean on a DEX?
Price impact means how much your own trade moves the pool's price, shown as the percentage difference between the pre-trade price and your average execution price. Larger trades in smaller pools have higher price impact.
Price impact vs slippage: which one is my fault?
Price impact is caused by your own order size and is visible before you sign. Slippage is the total gap between quote and fill, including price impact plus any price movement caused by other trades that execute before yours.
What is a good price impact?
For most trades on liquid pairs, price impact below 0.5% is typical and above a few percent is a warning sign. If impact is high, consider a smaller order, a deeper pool or a DEX aggregator.
JewelSwap Crypto Glossary · educational, not financial advice. Updated 2 October 2026. Browse the full glossary.
