The Negative Volume Index (NVI) is a technical indicator designed to track price changes on days when trading volume decreases compared with the previous period. The basic idea is that quieter trading sessions may provide useful information about the behaviour of informed or longer-term investors. Instead of reacting to every volume movement, NVI focuses specifically on periods of declining volume.

NVI typically starts from a base value, often 1,000. If volume decreases from one period to the next, the indicator is adjusted according to the percentage change in price. For example, if trading volume falls by 5% while the asset price rises by 2%, the NVI increases by approximately 2%. If volume falls and the price declines by 2%, the NVI decreases by approximately 2%. When volume increases, the NVI generally remains unchanged for that period.

Traders usually examine the direction of the NVI rather than focusing on its absolute numerical value. A rising NVI can suggest that prices are strengthening during lower-volume periods, while a declining NVI may indicate weakening price conditions. Some traders also compare the NVI with a moving average to generate potential trend signals.

The indicator can be useful for confirming broader market trends, but it should not normally be used by itself. Traders may combine NVI with price action, moving averages, support and resistance, or other technical indicators. It is also important to understand that volume data can vary between markets, particularly in decentralised markets such as forex and cryptocurrency. As a result, NVI signals should be interpreted in context and supported by appropriate risk management.

The Negative Volume Index is a technical indicator that assesses price behaviour during periods of declining trading volume. It is based on the idea that lower-volume periods may reveal market trends influenced by informed investors. The NVI changes only when the current period's trading volume is lower than the previous period's volume. During these periods, the index moves according to the percentage change in the closing price. Rising prices increase the NVI, while falling prices reduce it. If volume increases or remains unchanged, the indicator holds its previous value. Traders frequently use a long-term moving average, often calculated over 255 days, to help interpret the index. When the NVI remains above its moving average, market conditions may favour buyers. When it stays below the average, selling pressure may be stronger. These readings can help traders assess market sentiment, but they should not be considered definitive signals. Combining the NVI with trend indicators, price patterns, and effective risk management provides a more comprehensive approach to technical analysis.

The Negative Volume Index is a technical indicator that tracks price changes during periods of declining trading activity. It is often used to study market sentiment and identify possible trends that may not be obvious from volume alone. The NVI updates when the current period's trading volume is lower than the previous period's volume. A positive price change increases the index, while a negative price change reduces it. If volume increases or remains unchanged, the index retains its previous value. Traders commonly compare the NVI with a moving average to look for potential trend signals. When the index moves above the average, it may indicate strengthening bullish momentum. Conversely, falling below the average may suggest increasing bearish pressure. The indicator is sometimes associated with the idea that informed investors are active during quieter market periods, but this relationship is not guaranteed. For more reliable analysis, traders can combine the NVI with other indicators, price action, and support and resistance levels rather than relying on a single signal.