In trading on Tuesday, shares of the SuperDividend U.S. ETF ( DIV) entered into oversold territory, changing hands as low as $23.45 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 SuperDividend U.S., the RSI reading has hit 29.6 — by comparison, the RSI reading for the S&P 500 is currently 38.7. A bullish investor could look at DIV's 29.6 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), DIV's low point in its 52 week range is $20.97 per share, with $25.90 as the 52 week high point — that compares with a last trade of $23.50. SuperDividend U.S. shares are currently trading down about 2.1% on the day.