What is On-Balance Volume (OBV)?

On-Balance Volume (OBV) is a technical analysis indicator that measures buying and selling pressure by correlating trading volume with price movements. Developed by Joe Granville in the 1960s, OBV operates on the principle that volume precedes price movement, making it particularly valuable for analyzing cannabis stocks where sentiment-driven trading is common. OBV calculates a running total of volume based on whether the closing price moves up or down from the previous day. When a security closes higher than the previous day, all of that day's volume is considered 'up-volume' and added to the OBV. Conversely, when the price closes lower, the entire day's volume is subtracted from the OBV total. On days when the closing price remains unchanged, the OBV stays the same. In cannabis stock analysis, OBV is especially useful given the sector's volatility and news-driven price movements. For example, when analyzing major cannabis companies like Tilray (TLRY) or Canopy Growth (CGC), traders look for divergences between OBV and price. If a stock price is rising but OBV is declining, it may signal weakening buying interest and potential price reversal. The indicator is most effective when used alongside other technical analysis tools. Cannabis investors often combine OBV with moving averages, RSI, or support/resistance levels to validate trading signals. During periods of cannabis sector momentum, such as around legislative developments or earnings announcements, OBV can help distinguish between genuine accumulation and temporary price spikes driven by speculation. Key OBV signals include: trend confirmation when OBV moves in the same direction as price, divergence warnings when OBV contradicts price movement, and breakout validation when OBV surpasses previous highs or lows. However, OBV should not be used in isolation for investment decisions, as it doesn't account for the magnitude of price changes, only direction. *Disclaimer: This information is for educational purposes only and does not constitute investment advice. Cannabis stocks carry significant risks and volatility.*