In trading on Wednesday, shares of the Dynamic Consumer Staples Sector Portfolio ETF ( PSL) entered into oversold territory, changing hands as low as $41.48 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 Dynamic Consumer Staples Sector Portfolio, the RSI reading has hit 28.3 — by comparison, the RSI reading for the S&P 500 is currently 37.6. A bullish investor could look at PSL's 28.3 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), PSL's low point in its 52 week range is $35.12 per share, with $44.26 as the 52 week high point — that compares with a last trade of $41.48. Dynamic Consumer Staples Sector Portfolio shares are currently trading off about 2% on the day.