In trading on Tuesday, shares of the Fundamental Pure Large Value Portfolio ETF ( PXLV) entered into oversold territory, changing hands as low as $25.56 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 Fundamental Pure Large Value Portfolio, the RSI reading has hit 28.3 — by comparison, the RSI reading for the S&P 500 is currently 34.1. A bullish investor could look at PXLV'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), PXLV's low point in its 52 week range is $20.21 per share, with $27.30 as the 52 week high point — that compares with a last trade of $25.58. Fundamental Pure Large Value Portfolio shares are currently trading down about 1.2% on the day.