Most people trading DeFi are manually checking prices on 2-3 DEXs and calling it "arbitrage."

That's not arb. That's gambling with extra steps.

Real cross-chain arbitrage operates in milliseconds. Price disparities between Uniswap, Curve, dYdX, and cross-chain pools open and close before most traders even refresh their screen. By the time you spot it manually, it's already gone.

Here's what actually matters in 2026 DeFi arb:

1. Flash loans change the math entirely

You don't need capital to arb — you need speed and a reliable scanner. Flash loans let you borrow, execute, and repay in a single block. The bottleneck isn't money, it's signal quality.

2. Liquidity pool yield calculations are almost always wrong

Most traders look at headline APY and ignore impermanent loss, slippage, and gas. Real yield on most pools is 40-60% lower than advertised. You need net yield per dollar deployed, not gross APY.

3. Cross-chain is where the actual edges are

Intra-chain arb is nearly fully saturated by MEV bots. The real opportunities exist between chains — Arbitrum/Optimism/Base price mismatches on assets that haven't been bridged to equilibrium yet.

Build the right infrastructure first. Everything else follows.