is triangular arbitrage illegal 
buying and selling currency is legal as long as all funds information sources and other practices are not against any laws there is nothing illegal about the triangular arbitrage trading strategy the bottom linetriangular arbitrage is a strategy where you find price discrepancies between three currencies and buy and sell them in a specific order to make a profit because of the constant and rapid fluctuation in exchange rates it can be risky so you need to be experienced to try it or use a proven automated trading method 