• Any electronic component that generates alternating voltage.


  • A circuit, device, piece of equipment, object, or system which produces and/or maintains oscillation (1).
  • A circuit or device which produces the oscillation (1) of an electrical quantity, such as an alternating or pulsating current or voltage. Examples include crystal oscillators, klystrons, magnetrons, and Colpitts oscillators. Most oscillators utilize positive or negative feedback, and the frequency of their output may be fixed or variable. When referring to a circuit, also called oscillator circuit.
  • A circuit or nonrotating device which converts a DC input into a periodically varying electrical quantity.


  • A tool used in technical analysis which measures overbought and oversold prices of currencies or other assets using various methods. The Relative Strength Index is a popular oscillator used in the forex market to gauge overbought and oversold conditions in currency pairs, the oscillator indicates an overbought condition when it approaches 100, and an oversold condition when it approaches 0.