The Hathaway Average Price tool is a proprietary indicator available with the Hathaway Tools add-on from Pattern to Profit. The tool takes the average closing prices from a designated starting point, which accumulates over time, as opposed to a simple moving average which averages the closing prices over a designated fixed period of time.
This is a companion discussion topic for the original entry at https://www.optuma.com/kb/optuma/tools/hathaway/hathaway-average-price