WORLDCRYPTOCURRENCY GUIDE
Practical analysis

MEV: how transaction order changes execution

In onchain markets, inclusion and transaction order can move the price before your trade executes.

Transactions reordered before inclusion in a block
Transactions reordered before inclusion in a block
Short answer

Compare price impact, liquidity and slippage tolerance. Private routing may reduce some exposure but introduces its own intermediaries and guarantees.

Understand ordering

Inspect the block

Measure cost

Compare quote and result

Choose safeguards

Check their limits

01

Understand ordering

Participants seek value from selecting or sequencing operations. A visible trade may create an arbitrage or sandwich opportunity.

02

Measure cost

Before signing compare quoted price, minimum received, pool depth, fees and timing. A very wide tolerance increases exposure.

03

Choose safeguards

Limit orders or some private routes can reduce specific risks. Inspect who receives the order, censorship possibilities and failure terms.

04

Review execution

Compare your trade with neighboring transactions and pool events. Price differences can also come from ordinary volatility or thin liquidity.

DATA

Checks to make

TopicCheck
Understand orderingInspect the block
Measure costCompare quote and result
Choose safeguardsCheck their limits
Review executionRead nearby trades
FAQ

Frequently asked questions

Is all MEV an attack?

No. Some strategies are arbitrage; others harm users.

Does private routing guarantee best price?

No. Inspect its rules and compare actual execution.

Verifiable sources

Independent educational content reviewed against primary documentation. No personalized recommendation or promise of returns. Reviewed September 25, 2026