In trading on Thursday, shares of the MLP ETF (MLPA) entered into oversold territory, changing hands as low as $14.8701 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 MLP, the RSI reading has hit 27.0 — by comparison, the RSI reading for the S&P 500 is currently 44.7. A bullish investor could look at MLPA's 27.0 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), MLPA's low point in its 52 week range is $14.58 per share, with $17.57 as the 52 week high point — that compares with a last trade of $14.90. MLP shares are currently trading off about 0.8% on the day.