Arbitrage

Mechanism

Statistical arbitrage monitors the spread between two correlated pairs (e.g. EUR/USD and GBP/USD, or EUR/USD and EUR/GBP). When the correlation-adjusted spread exceeds a threshold, the EA shorts the overpriced instrument and longs the underpriced one, closing when the spread reverts. Latency arbitrage variants exploit price feed delays between brokers — most brokers now prohibit this and detect it via pattern analysis.

Suitability

Statistical arb is legal and broker-neutral; latency arb is restricted at most brokers in this catalogue. Statistical variants work best on EUR/USD vs GBP/USD (correlation 0.90+) and require tight spread accounts. Performance degrades when correlation breaks down during risk events. Suitable for systematic traders comfortable with pairs-trading logic; not recommended as a first EA strategy.

Notes

Arbitrage, in the textbook sense, is a riskless profit from the same thing priced two ways. The retail reality is more modest and more honest about its constraints. Statistical arbitrage trades the spread between two correlated pairs — shorting the relatively overpriced one and buying the underpriced one when their relationship stretches, then closing as it reverts. Latency arbitrage, which exploits price-feed delays between brokers, is a different animal: most brokers in this catalogue now prohibit and actively detect it, so it is not a strategy this site treats as viable.

Statistical arbitrage is legal and broker-neutral, but it is not a beginner’s tool. It depends on a correlation holding (EUR/USD and GBP/USD sit above 0.90 in normal conditions) and degrades precisely when a risk event breaks that correlation — which is also when losses cluster. Tight spreads are essential because the edge per leg is small.

When evaluating an arbitrage EA on this catalogue:

1. Type — confirm it is statistical, not latency-based (the latter is restricted and fragile).
2. Correlation stability — how does it behave when the pair relationship breaks during a shock?
3. Spread sensitivity — small per-trade edges demand a Raw/ECN account.
4. Complexity fit — pairs-trading logic is advanced; not a recommended first EA.