ADX (Average Directional Index): Standard technical indicator that measures the strength of a trend.
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.
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.
Jobber: A slang word for a trader which is aimed toward fast but small and short-term profit from an intra-day trading. Jobber rarely leaves open positions overnight.