In trading on Friday, shares of the SPDR MSCI ACWI ex-US ETF ( CWI) entered into oversold territory, changing hands as low as $33.33 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 MSCI ACWI ex-US, the RSI reading has hit 27.8 — by comparison, the RSI reading for the S&P 500 is currently 43.1. A bullish investor could look at CWI'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), CWI's low point in its 52 week range is $31.80 per share, with $37.92 as the 52 week high point — that compares with a last trade of $33.35. SPDR MSCI ACWI ex-US shares are currently trading down about 1.5% on the day.