In trading on Thursday, shares of the SPDR S&P Emerging Middle East & Africa ETF ( GAF) entered into oversold territory, changing hands as low as $65.295 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 SPDR S&P Emerging Middle East & Africa, the RSI reading has hit 27.3 — by comparison, the RSI reading for the S&P 500 is currently 54.7. A bullish investor could look at GAF's 27.3 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), GAF's low point in its 52 week range is $61.92 per share, with $77.42 as the 52 week high point — that compares with a last trade of $65.30. SPDR S&P Emerging Middle East & Africa shares are currently trading down about 4.7% on the day.