is an extremely popular indicator used in . can be used to identify aspects of a security's overall trend. Most notably these aspects are momentum, as well as trend direction and duration. What makes so informative is that it is actually the combination of two different types of indicators. First, employs two Moving Averages of varying lengths (which are lagging indicators) to identify trend direction and duration. Then, takes the difference in values between those two Moving Averages ( Line) and an of those Moving Averages (Signal Line) and plots that difference between the two lines as a histogram which oscillates above and below a center Zero Line. The histogram is used as a good indication of a security's momentum.
The ( ) is a momentum oscillator used in primarily to identify overbought and oversold levels by measuring an instrument's variations away from its statistical mean. is a very well-known and widely-used indicator that has gained level of popularity in no small part of its versatility. Besides overbought/oversold levels, is often used to find reversals as well as divergences. Originally, the indicator was designed to be used for identifying trends in , however it is now used in a wide range of financial instruments.