Some of Forex Glossarys

ADX (Average Directional Index) — standard technical indicator that measures the strength of a trend.
Ask (Offer) — price of the offer, the price you buy for.
Aussie — a Forex slang name for the Australian dollar.
Bank Rate — the percentage rate at which central bank of a country lends money to the country's commercial banks.
Bid — price of the demand, the price you sell for.
Broker — the market participating body which serves as the middleman between retail traders and larger commercial institutions.
Cable — a Forex traders slang word GBP/USD currency pair.
Carry Trade — in Forex, holding a position with a positive overnight interest return in hope of gaining profits, without closing the position, just for the central banks interest rates difference.
CCI (Commodity Channel Index) — a cyclical technical indicator that is often used to detect overbought/oversold states of the market.
CFD — a Contract for Difference — special trading instrument that allows financial speculation on stocks, commodities and other instruments without actually buying.
Commission — broker commissions for operation handling.
CPI — consumer price index the statistical measure of inflation based upon changes of prices of a specified set of goods.
EA (Expert Advisor) — an automated script which is used by the trading platform software to manage positions and orders automatically without (or with little) manual control.
ECN Broker — a type of Forex brokerage firm that provide its clients direct access to other Forex market participants. ECN brokers don't discourage scalping, don't trade against the client, don't charge spread (low spread is defined by current market prices) but charge commissions for every order.
ECB (European Central Bank) — the main regulatory body of the European Union financial system.
Fed (Federal Reserve) — the main regulatory body of the United States of America financial system, which division — FOMC (Federal Open Market Committee) — regulates, among other things, federal interest rates.
Fibonacci Retracements — the levels with a high probability of trend break or bounce, calculated as the 23.6%, 32.8%, 50% and 61.8% of the trend range.
Flat (Square) — neutral state when all your positions are closed.
Fundamental Analysis — the analysis based only on news, economic indicators and global events.
Gap — a difference between the previous period's close price and the next period's open price. In Forex usually only occurs during weekends — between the Friday's close and the Monday's open price.
GDP (Gross Domestic Product) — is a measure of the national income and output for the country's economy; it's one of the most important Forex indicators.
GTC (Good Till Canceled) — order to buy or sell of a currency with a fixed price or worse. The order is alive (good) until execution or cancellation.