VWAP stands for volume-weighted average price. TS_VWAP calculates the ratio of the value traded to the total volume traded over a particular time horizon.
VWAP is a measure of the average price of a stock over a defined trading horizon. You can use TS_VWAP as both a simple and an OLAP-style aggregate function.
Unlike the other time series functions, TS_VWAP does not call the IMSL libraries.