An indicator can refer to different things depending on the context. It can be a substance, a measurement, or a statistic used to provide information about something. Here are some common types of indicators:
- pH Indicator : A substance that is added to a solution to determine its acidity or basicity visually or spectroscopically by changes in absorption and/or emission properties
- Instrument Indicator : A pointing or directing mechanism, such as a pointer on the dial of an instrument to show pressure, temperature, speed, volume, etc.
- Economic and Technical Indicator : In the context of investing, indicators are statistics used to measure current conditions as well as to forecast financial or economic trends. Economic indicators measure the overall health of the economy and predict its direction, while technical indicators refer to chart patterns deriving from the price, volume, or open interest of a given security
- General Indicator : It can also refer to any of a group of statistical values that give an indication of something, or a substance used to show visually (as by change of color) the condition of a solution with respect to the presence of a particular material
In summary, an indicator can be a substance, a measurement, or a statistic used to provide information about the acidity of a solution, the operating conditions of a machine, or the current and future trends in the economy or the financial markets.
