Understanding Volume

"Tags: volume, average volume, delivery, participation, volume bars Prerequisites: Understanding Price Price shows where the transaction occurred. Volume shows how much participation stood behind it. Questions this article answers What does volume measure? Why can high volume be positive or negative? What is average volume? How is volume different from delivery quantity and turnover? 1. What volume measures Volume is the number of shares or units traded during a selected period. If 5 lakh shares of a company change hands during the day, the daily volume is 5 lakh shares. A matched transaction is counted as the traded quantity, not once for the buyer and again for the seller. 2. Volume depends on the timeframe On a one-minute chart, each bar shows the quantity traded during one minute. On a daily chart, it shows the total quantity traded during the day. The same number can have a different meaning depending on the timeframe and the stock. 3. Volume is activity, not direction High volume does not automatically mean bullish. Every completed trade has both a buyer and a seller. The useful question is where the volume occurred and how price behaved while that volume was traded. High volume with strong upward price progress can indicate aggressive demand. High volume with a sharp decline can indicate aggressive supply. 4. Price and volume must be read together 5. Average volume Average volume is the mean volume over a chosen lookback period, such as 20 or 50 sessions. Comparing today's volume with a recent average helps determine whether activity is ordinary or unusual. The lookback period should match the purpose. A short average reacts quickly; a longer average provides a more stable baseline. 6. Relative volume Relative volume compares current volume with a normal reference level. A simple end-of-day version is current daily volume divided by average daily volume. A result of 2.0 means volume is twice the selected average. However, intraday relative-volume calculations should compare activity at the same time of day, because the open and close usually trade more volume than midday. Relative Volume = Current Volume / Average Volume 7. Volume expansion Volume expansion means activity is rising meaningfully above recent levels. It can validate a breakout, confirm a breakdown, identify an earnings reaction or signal a major change in ownership. Expansion is evidence of participation, not a complete trade signal. 8. Volume contraction Volume contraction means fewer shares are changing hands than usual. During a controlled consolidation or pullback, contraction can suggest that selling pressure is becoming less aggressive. Low volume can also simply mean lack of interest or poor liquidity. Context separates healthy quietness from market neglect. 9. Delivery quantity and delivery percentage Some Indian-market datasets distinguish traded quantity from shares marked for delivery rather than closed within the same session. Delivery data can offer additional context, but it should not be treated as a direct measure of institutional buying. Different strategies, settlement choices and operational activity affect the number. Availability and calculation methods can vary by data source. 10. Volume is not turnover Volume counts units. Turnover measures monetary value. One lakh shares traded at Rs 50 and one lakh shares traded at Rs 2,000 have identical share volume but dramatically different traded value. 11. Volume spikes A volume spike is an unusually large burst of activity. It may be caused by results, corporate announcements, index changes, block activity, panic, euphoria or a genuine trend transition. The next sessions reveal whether the spike created lasting demand, lasting supply or only a one-day event. 12. Common beginner mistakes Believing high volume is always positive High volume on a severe decline may reflect intense selling. Comparing raw volume across unrelated stocks Different share prices and shares outstanding make raw counts hard to compare. Ignoring the timeframe A large five-minute bar and a large daily bar describe different activity. Treating delivery percentage as proof of smart-money buying Delivery data is contextual, not definitive. Using volume without price structure Activity alone does not identify a valid entry or exit. 13. DStreet principle Volume is the footprint of participation. Read the footprint together with the direction, location and quality of price movement. 14. Beginner checklist I know that volume counts traded shares or units. I do not label high volume bullish without checking price behaviour. I compare current activity with a relevant average. I understand that low volume can mean contraction or illiquidity. I keep volume, turnover and delivery data separate. 15. Quick knowledge check Question: What does volume measure? Answer: The number of shares or units traded during a period. Question: Does high volume automatically mean buyers are in control? Answer: No. Question: What is relative volume? Answer: Current volume compared with a normal or average reference. Question: How is turnover different? Answer: Turnover measures the monetary value traded. 16. Next lesson Turnover and Traded Value explains how market activity is translated from share quantity into rupee value."