In trading on Tuesday, shares of the WisdomTree Australia Dividend Fund ETF ( AUSE) entered into oversold territory, changing hands as low as $51.80 per share. We define oversold territory using the Relative Strength Index, or RSI, which is a technical analysis indicator used to measure momentum on a scale of zero to 100. A stock is considered to be oversold if the RSI reading falls below 30.In the case of WisdomTree Australia Dividend Fund, the RSI reading has hit 26.8 — by comparison, the RSI reading for the S&P 500 is currently 51.5. A bullish investor could look at AUSE's 26.8 reading as a sign that the recent heavy selling is in the process of exhausting itself, and begin to look for entry point opportunities on the buy side. Looking at a chart of one year performance (below), AUSE's low point in its 52 week range is $51.80 per share, with $64.82 as the 52 week high point — that compares with a last trade of $51.80. WisdomTree Australia Dividend Fund shares are currently trading down about 2.6% on the day.