Technical Indicators is one of trading technique used in Technical Analysis, besides Fundamental Analysis. It’s using many technical pattern and models such as Moving Averages, Parabolic SAR, Relative Strength Index, etc. Technical traders use charts, trend lines, support and resistance, as well as numerous designs and mathematical analyses to identify trading opportunities.

The technical analysis is widespread among traders and financial experts, but as in the academic field pseudoscience or “Voodoo finance,” it receives little or no direct support of academic sources and as my “astrology”. Scientists like Eugene Fama say that the evidence for the technical analysis is sparse and not consistent with the weak form of generally accepted efficient market hypothesis.

In the foreign exchange markets, however, its use can be more widely known as “fundamental” analysis. While some isolated studies have shown that technical trading rules could lead to a consequent return to the period before 1987, most scientific work focused on the nature of the anomalous position of the foreign exchange market. It is speculated that this anomaly is due to central bank intervention.

Technical analysts also extensively use of indicators, which are usually mathematical transformations of the price or volume. These indicators are used to determine whether an asset is trending, and if there is a price. Technicians even after relations between price, volume, and in the case of futures, open interest. Examples are the relative strength index, and MACD. Other ways of study, the correlation between changes in the options [implied volatility] and / call ratios with price stability.

You can see the complete list here : Technical Indicators List.