The foreign exchange (FX) markets are experiencing a time of great change brought about by unprecedented levels of transparency and efficiency in the aftermath of the Global Financial Crises of the 2000s. Industry experts Demetri Papacostas and Francesco Tonin use their extensive experience and knowledge to examine the behaviour of the FX markets' major players during this critical period. Fintech and the global coordination of regulation is allowing, for the first time, a look under the hood.