What is technical analysis primarily concerned with?

Technical analysis is primarily focused on examining a stock's past performance and chart patterns. This approach involves analyzing price movements, volume trends, and various chart indicators to forecast future price movements. Practitioners of technical analysis believe that all relevant information is already reflected in the stock prices, and therefore, they rely on historical data to identify trends and patterns that can help in making future investment decisions.

By studying this historical data, technical analysts use charting techniques to recognize patterns, such as support and resistance levels, which can indicate potential future price movements. This method is distinct from other analyses that might look at economic factors, company fundamentals, or investor behavior.

In contrast, the other options refer to different aspects of investment analysis. Fundamental economic factors delve into the financial health of a company and broader economic conditions, while market indices and interest rates focus on overall market performance rather than individual stock movements. Personal investor behavior relates to psychological factors influencing decisions, which are not the primary concern of technical analysis.