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What is triangular arbitrage in forex and how does it work?

Triangular arbitrage exploits mispricing between three related currency pairs. For example, if EUR/USD × USD/JPY ≠ EUR/JPY, a trader can cycle trades—buying one pair, selling another, and converting back—locking in a risk-free profit. Institutions use high-speed algorithms to detect and execute such opportunities within milliseconds, as pricing gaps vanish quickly. Retail traders rarely succeed in triangular arbitrage due to execution latency, wider spreads, and higher fees. Benefits: theoretically risk-free profit and contribution to market efficiency. Risks: slippage and delays often turn “arbitrage” into losses. Still, understanding triangular arbitrage is valuable because it illustrates how forex markets remain balanced and why inefficiencies disappear quickly.