Volume represents total shares or contracts traded during a defined session. Volume increases when more market participants enter, decreases when they exit. Volume is displayed as histogram on charting software's x-axis
Technical analysis studies market supply and demand to predict future trends. Market discounts everything, price moves in trends, history repeats itself. Technical analysis focuses on charts, fundamental analysis on financial statements. Technical analysis is shorter-term, fundamental analysis longer-term
Stock volume is the total number of shares traded during a specific period. Volume indicates buying and selling pressure and market strength. Volume is measured in shares traded, not dollar value