HIV and men who have sex with men sexual activity with members of the same sex, regardless of how they personally identify themselves. Many MSM choose not to (or cannot for other reasons) identify as homosexual or bisexual. Similarly, the label excludes men who identify as gay or bisexual, but who have never had sex with another man, including many gay teenagers. The terms MSM and women who have sex with women (WSW) have been used in medical scholarship since at least 1990. But, the term has been attributed to Glick "et al.", because their usage in a 1994 study solidified the concept in medical terminology. MSM is
Moving average crossover average is medium or long term moving average (e.g. 50-, 100- or 200-day period). A short term moving average is faster because it only considers prices over short period of time and is thus more reactive to daily price changes. On the other hand, a long term moving average is deemed slower as it encapsulates prices over a longer period and is more lethargic. However, it tends to smooth out price noises which are often reflected in short term moving averages. A moving average, as a line by itself, is often overlaid in price charts to indicate price trends. A