In trading on Thursday, shares of the iShares MSCI Belgium Capped Investable Market Index Fund ETF ( EWK) entered into oversold territory, changing hands as low as $13.61 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 iShares MSCI Belgium Capped Investable Market Index Fund, the RSI reading has hit 28.7 — by comparison, the RSI reading for the S&P 500 is currently 49.8. A bullish investor could look at EWK's 28.7 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), EWK's low point in its 52 week range is $10.69 per share, with $15.14 as the 52 week high point — that compares with a last trade of $13.67. iShares MSCI Belgium Capped Investable Market Index Fund shares are currently trading up about 0.7% on the day.