Community Forex Questions
How does the Negative Volume Index work?
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.
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.
Oct 08, 2026 03:10