In trading on Tuesday, shares of the iShares MSCI Sweden ETF ( EWD) entered into oversold territory, changing hands as low as $31.35 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 Sweden, the RSI reading has hit 29.7 — by comparison, the RSI reading for the S&P 500 is currently 33.6. A bullish investor could look at EWD's 29.7 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), EWD's low point in its 52 week range is $29.68 per share, with $37.34 as the 52 week high point — that compares with a last trade of $31.54. iShares MSCI Sweden shares are currently trading off about 0.2% on the day.