The change in asset price caused by executing a large trade order.
Price Impact refers to how much an asset’s price changes as a result of executing a trade — especially large trades relative to available liquidity. It is a crucial metric for traders, institutions, and market makers.
High price impact signals insufficient liquidity at the target price.
What Causes Price Impact
Low liquidity in the trading pair
Large order size relative to order book depth
AMM pool imbalance
Market stress or volatility
Slippage tolerance in DEX trades
On order-book exchanges, price impact comes from “eating” through multiple price levels.
Price Impact on CEX vs DEX
Centralized Exchanges (CEX):
Price impact depends on order book depth
Market makers help reduce impact
Large market orders cause noticeable slippage
Decentralized Exchanges (DEX):
AMM formulas (x·y = k) determine price impact
Larger swaps move the pool ratio more
Small pools = drastic price impact
Why Price Impact Matters
Affects profitability
Impacts arbitrage and market-making strategies
Determines execution quality for large trades
Reveals liquidity conditions of a token
Institutions closely monitor price impact before executing sizable orders.
Summary
Price impact is the effect a trade has on an asset’s market price, typically increasing with low liquidity or large order size.
