In trading on Friday, shares of the Uranium ETF (URA) entered into oversold territory, changing hands as low as $6.01 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 Uranium, the RSI reading has hit 28.4 — by comparison, the RSI reading for the S&P 500 is currently 68.6. A bullish investor could look at URA's 28.4 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), URA's low point in its 52 week range is $5.73 per share, with $9.22 as the 52 week high point — that compares with a last trade of $6.01. Uranium shares are currently trading down about 1.5% on the day.