In trading on Thursday, shares of the iShares Core MSCI Total International Stock ETF ( IXUS) entered into oversold territory, changing hands as low as $57.23 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 Core MSCI Total International Stock, the RSI reading has hit 28.0 — by comparison, the RSI reading for the S&P 500 is currently 32.2. A bullish investor could look at IXUS's 28.0 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), IXUS's low point in its 52 week range is $51.21 per share, with $60.98 as the 52 week high point — that compares with a last trade of $57.25. iShares Core MSCI Total International Stock shares are currently trading off about 1.1% on the day.