MEV & Arbitrage

MEV and Arbitrage is a skill from the CLI Trader project that gives trading agents a realistic understanding of cross-exchange price discrepancies, basis trading opportunities, and the MEV landscape that affects every DeFi transaction. Developed by the CLI Trader team, this skill takes an honest approach to a space filled with exaggerated profit claims — it covers the mechanics of various arbitrage strategies while being transparent about the infrastructure requirements, competitive dynamics, and cost structures that determine whether a given approach is viable for a specific trader. The uncomfortable truth is that most retail arbitrage strategies lose money after accounting for fees, slippage, and latency disadvantages, and this skill is designed to help you identify the narrow set of opportunities where retail participation can be genuinely profitable rather than chasing strategies dominated by institutional infrastructure.

The skill covers four major arbitrage categories with honest profitability assessments for each. Cross-exchange arbitrage between centralized exchanges (CEX-CEX) and between centralized and decentralized exchanges (CEX-DEX) is analyzed with full cost modeling including trading fees, withdrawal fees, transfer times, slippage, and the capital lockup cost of maintaining balances across multiple venues. Funding rate basis trades — buying spot and shorting the perpetual contract to capture elevated funding payments — represent the most accessible strategy for retail traders because they do not require speed advantages and can generate steady yield in contango markets. The agent monitors funding rates across major perpetual exchanges, calculates net annualized yield after all costs, and flags when rates reach historically attractive or dangerous levels. DEX arbitrage including cyclic and triangular paths is covered primarily as context — these opportunities are almost exclusively captured by professional MEV searchers with sophisticated infrastructure. The MEV module focuses on the defensive side: understanding sandwich attacks, frontrunning, and backrunning so you can protect your own transactions through appropriate slippage settings, private transaction submission via Flashbots Protect or Jito, and timing awareness. Infrastructure requirements for each strategy are documented clearly so you can assess whether your setup is competitive before committing capital.

Within a trading workflow, this skill serves two distinct functions. For active arbitrage, the agent scans funding rates and cross-exchange spreads, filters for opportunities that meet minimum profitability thresholds after full cost accounting, and presents validated setups with complete P&L projections. For passive defense, the agent evaluates every DeFi transaction you plan to execute through the MEV lens, recommending protection mechanisms and flagging situations where value extraction is likely. This dual role — finding the rare genuine opportunities while protecting you from the pervasive extraction that characterizes DeFi markets — makes the skill relevant for any crypto trader, not just those actively pursuing arbitrage strategies.

For the complete methodology — including formulas, decision trees, worked examples, and validation checklists — see the full MEV & Arbitrage skill guide.