Extensive reading is actually the most easily overlooked aspect of trading.
The breadth of your reading determines whether you can reinterpret market fluctuations using dimensions such as macroeconomics, institutional dynamics, human nature, and history.
The depth of your reading determines whether you are led by information or can make independent judgments based on underlying logic.
The multi-layered and multi-dimensional understanding you develop will ultimately manifest on the charts, becoming your way of reacting to market fluctuations.