Foreign exchange (forex) or FX trading involves trading the prices of global currencies, and at City Index it is possible to trade on the prices of a huge range of global currencies. Currency trading allows you to speculate on the movement of one currency against another, and is traded in pairs, for example the Euro against the US Dollar (EUR/USD). The City Index Trading Central technical analysis portal constantly scans stocks, forex and commodity markets. It uses a database of chart patterns, technical indicators and oscillators to identify trading signals which might benefit their clients. Forex. Forex trading. FX trading on 84 FX pairs as Spread Betting, CFD Trading and FX on MT4. Spreads from 0.5 points Spread betting is also exempt from UK Capital Gains Tax. However, tax laws are subject to change and depend on individual circumstances. City Index is a trading name of GAIN Capital UK Limited. Head and Registered Office