Correlation Pair
Definition
A correlation pair is a forex pair whose price moves are statistically correlated with another pair's moves. EURUSD and GBPUSD are positively correlated (both react to USD moves); EURUSD and USDCHF are negatively correlated (opposite USD direction). Correlation-pair awareness prevents accidental concentration when running multi-pair strategies.
In-depth: Correlation Pair
Correlation pairs is the practical application of statistical correlation concepts to forex risk management. Traders who run multiple pairs need to know which pairs are essentially the same trade in different costumes.
Major forex pair correlations (typical 90-day rolling, normal regime):
• EUR/USD ↔ GBP/USD: +0.85 to +0.95 (strong positive — same USD-quote structure) • EUR/USD ↔ AUD/USD: +0.65 to +0.85 (moderate-to-strong positive) • EUR/USD ↔ USD/CHF: -0.80 to -0.95 (strong negative — opposite USD structure) • EUR/USD ↔ USD/JPY: -0.30 to -0.55 (moderate negative) • GBP/USD ↔ EUR/GBP: -0.40 to -0.65 (moderate negative — both contain GBP but opposite direction) • AUD/USD ↔ NZD/USD: +0.85 to +0.95 (strong positive — commodity-currency siblings) • USD/CAD ↔ Oil prices: -0.50 to -0.75 (moderate negative — CAD-strength correlated with oil) • AUD/USD ↔ Copper prices: +0.50 to +0.70 (moderate positive — AUD-commodity link)
Using correlation pair awareness in EA deployment:
• **Position concentration analysis**: sum exposure across correlated pairs; treat 0.8+ correlated pairs as essentially same exposure for risk-sizing purposes • **Diversification verification**: genuine multi-pair diversification requires running pairs with correlation under 0.5; running 0.85+ correlated pairs as if they're independent overstates diversification by 2-3× • **Stress-regime preparation**: pair correlations intensify during regime stress (especially USD-strength regimes). The 0.85 normal-regime correlation becomes 0.95+ during stress; multi-pair concentration risk amplifies exactly when you don't want it • **Cross-pair opportunity**: trading high-correlation pairs in opposite directions on different conviction signals provides hedged exposure; trading them in same direction provides leveraged exposure
For EA buyer evaluation: multi-pair EAs should document their per-pair correlation handling. Vendors who address correlation pair concentration explicitly signal mature risk engineering; vendors who run multi-pair without correlation cap or correlation-pair awareness are likely producing concentrated single-factor bets disguised as diversification.