Introduction: Volume, an Underutilized Indicator in Trading
In the world of trading, many technical indicators are taught and used daily: moving averages, RSI, MACD, Bollinger Bands… However, a key indicator often remains unknown or underused: volume. Yet, volume is a fundamental element that reflects the intensity of trades and can confirm or refute a trend. This article offers an in-depth analysis of volume in trading, its practical utility, the On-Balance Volume (OBV) method, volume/price divergences, as well as concrete applications on two major markets: Bitcoin (BTC) and the CAC40 index.
Volume as Trend Confirmation: Principles and Mechanisms
Volume represents the quantity of shares traded over a given period. Unlike prices, it measures the real commitment of investors. A bullish trend accompanied by increasing volume is often considered robust: it reflects heightened interest and validation by buyers. Conversely, a trend with decreasing volume may signal underlying weakness and a risk of reversal.
For example, on the CAC40 in 2023, during the rebound phase between March and June, the average daily volume increased by 15% compared to the previous quarter, rising from 1.2 billion euros to 1.38 billion euros (source: Euronext), confirming the strength of the recovery. Conversely, the declines in September were accompanied by a 10% drop in volume, indicating relative disinterest from sellers.
On-Balance Volume (OBV): A Simple and Powerful Indicator
OBV, developed by Joe Granville in the 1960s, accumulates volume based on price changes. When the price closes higher, the day’s volume is added to the OBV; when it closes lower, the volume is subtracted. OBV thus serves to detect buying or selling pressure and can precede price movements.
On BTC, OBV has often anticipated major reversals. For example, in November 2023, while the price stagnated around 34,000 USD, OBV formed a higher low than the previous one, indicating accumulation despite price stagnation. A few days later, BTC initiated an 8% rise within a week (source: Bloomberg).
Volume/Price Divergences: An Early Warning Signal
Divergences between volume and price are valuable technical signals. A bullish divergence occurs when prices fall or stagnate but volume (or OBV) increases, suggesting hidden accumulation. Conversely, a bearish divergence happens when prices rise but volume decreases, indicating potential weakness.
On the CAC40, in August 2023, a bearish divergence was observed: the CAC40 reached new highs at 7,200 points, but volume and OBV declined. This signal preceded the 5% correction in September (source: Euronext, INSEE).
Concrete Volume Analysis on Bitcoin (BTC)
The Bitcoin market is known for its volatility and highly fluctuating volumes. In 2023, the average daily BTC/USD volume on major platforms (Coinbase, Binance) ranged between 25 and 40 billion dollars (source: CoinMarketCap).
These data show that the strongest upward phases are accompanied by sustained volume. The divergences in July-September 2023 allowed anticipation of a slowdown before the October correction.
Concrete Volume Analysis on the CAC40
The CAC40, the flagship index of the Paris Stock Exchange, shows an average daily volume around 1.2 billion euros in 2023 (source: Euronext). Volume analysis helps refine the reading of index movements.
Period
Average CAC40 Price
Average Daily Volume (billion EUR)
Comment
January - March 2023
6,700 points
1.15
Low volume, neutral trend
April - June 2023
7,000 points
1.32
Rising volume, confirmed bullish trend
July - September 2023
7,150 points
1.10
Volume decline, bearish divergence
October - December 2023
6,800 points
1.25
Volume increased, start of rebound
The correlation between volume and price on the CAC40 confirms the importance of this indicator to validate the strength of movements. The summer volume decline preceded the autumn correction.
Conclusion: An Indicator to Integrate Imperatively into Your Strategy
Volume is an indispensable indicator, often neglected by retail traders and even some professionals. Its ability to confirm trends, signal divergences, and anticipate reversals makes it a valuable tool.
The concrete analyses of Bitcoin and the CAC40 in 2023 demonstrate that volume variations often precede significant price movements. OBV, simple to calculate, offers dynamic tracking of buying or selling pressure. Volume/price divergences constitute early warning signals, helping to avoid traps or seize opportunities.
Verdict for French investors: Systematically integrating volume into technical analysis on the CAC40, French stocks, or cryptocurrencies can improve the quality of investment decisions. Ignoring this parameter risks underestimating the real market strength and missing key signals.
In practice, we recommend using volume alongside classic indicators and paying particular attention to divergences with price, as well as OBV evolution, to refine your entry and exit points.
