In forex trading, “extended” usually refers to a situation where a currency pair has experienced a significant and sustained price move in one direction. For example, if the EUR/USD pair has been rising steadily for several days, traders might say that the uptrend has been “extended.” The term can also be used to describe a situation where a technical indicator or oscillator has been showing overbought or oversold conditions for an extended period, suggesting that a reversal may be imminent.