The full form of ADTV is Average Daily Trading Volume

Average Daily Trading Volume (ADTV) is a technical indicator used by investors that refers to the number of shares of a particular stock that, on average, change hands during a single trading day. The average daily trading volume can be calculated for any span of time – five days, 10 days, etc. – but a commonly used ADTV measure is the average trading volume for a period of 20 or 30 days.

Average daily trading volume can be tracked for a single stock, for options on a stock, or for market indexes such as the S&P 500.

An alternative to the average daily trading volume indicator is the average daily value indicator. Average daily value is a computation of the average dollar amount of a stock that is, on average, traded daily.

• Average Daily Trading Volume (ADTV) refers to the number of shares of a particular stock that, on average, change hands during a single trading day.
• Significant deviations from the ADTV usually indicate greater or lesser buying or selling interest in the stock from large institutional investors.
• Average trading volume is an important indicator of liquidity for investors and support or resistance price levels.