Filter

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Filter

A rule that stipulates when a security should be bought or sold according to its price action.

Filter Rule

In technical analysis, an arbitrarily set percentage of increase or decline in a stock's price that the analyst sees as an indicator to buy or sell the stock. For example, the analyst may set his/her own filter rule at 15%. If the stock rises 15%, the analyst recommends buying; if it falls 15%, he/she recommends selling. While the particular percentage is subjective, one arrives at it by observing the stock's historical trends. The filter rule exists to help the investor avoid buying or selling at insignificant or anomalous changes in price. However, many analysts do not believe that the filter rule consistently produces profits for the investor.
References in periodicals archive ?
The chamber of the dosimeter was placed in front of the collimator, and the compensating filters were positioned between the collimator and the dosimeter chamber.
Many institutions use self-constructed compensating filters. A variety of filter shapes are used;[1-9] the filter shape usually is dependent on different image receptor systems, part positions and exposure factors.
There have been some reports in the scientific literature of dose reduction using compensating filters.[7,8] Thus, we measured exposure reduction in three radiographic situations by comparing area values of radiation exposures using area dosimeters.