An Anchored VWAP (Anchored - Volume weighted Average Price) lets you make up an idea on whether the control of the market is on side of bulls or bears. Like the traditional VWAP, it incorporates price and volume in a weighted average and can be used to identify areas of support and resistance on the chart. Just like in intraday setup, a traditional VWAP lets you gauge the control of bulls or bears on the price after the opening of the day, the Anchored VWAP (AVWAP) tells you the control of bulls or bears with respect to an important day in the past over daily or weekly chart. In other words, an AVWAP indicator ties VWAP calculations to a specific price bar chosen by the trader.
In a price reversal from the previous swing high or low, an A-VWAP tells us a general idea about the long-term (or short term based on the Anchor date) support or resistance or the price. In the attached TV screen, A-VWAP is applied over BankNifty futures (current contract in front). Here we can see that the price has taken reversals multiple times from the AVWAP.