In trading on Tuesday, shares of the Russia Small-Cap ETF ( RSXJ) entered into oversold territory, changing hands as low as $29.66 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 Russia Small-Cap, the RSI reading has hit 29.1 — by comparison, the RSI reading for the S&P 500 is currently 48.3. A bullish investor could look at RSXJ's 29.1 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), RSXJ's low point in its 52 week range is $27.96 per share, with $44.91 as the 52 week high point — that compares with a last trade of $29.76. Russia Small-Cap shares are currently trading down about 1.4% on the day.