In trading on Monday, shares of the WisdomTree Global ex-U.S. Real Estate Fund ETF ( DRW) entered into oversold territory, changing hands as low as $27.9543 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 Global ex-U.S. Real Estate Fund, the RSI reading has hit 27.8 — by comparison, the RSI reading for the S&P 500 is currently 35.8. A bullish investor could look at DRW's 27.8 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), DRW's low point in its 52 week range is $25.69 per share, with $31.33 as the 52 week high point — that compares with a last trade of $28.03. WisdomTree Global ex-U.S. Real Estate Fund shares are currently trading off about 1.1% on the day.