Technical analysis

"Technical analysis is the study of market action, primarily through the use of charts, for the purpose of forecasting future price trends.". In its purest form, technical analysis considers only the actual price behavior of the market or instrument, based on the premise that price reflects all relevant factors before an investor becomes aware of them through other channels.
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Security analysis that seeks to detect and interpret patterns in past security prices.

Technical analysis uses charts to examine changes in price patterns, volume of trading, open interest, and rates of change to predict and profit from trends. Someone who follows technical rules (called a technician) believes that prices will anticipate changes in fundamentals.

In imagery interpretation, the precise description of details appearing on imagery. 1/3/82

En interprétation d'imagerie, description précise des détails apparaissant sur une représentation. 1/3/82

An analysis of price and volume data as well as other related market indicators to determine past trends that are believed to be predictable into the future. Charts and graphs are often utilized.