In trading on Friday, shares of the Proshares UltraShort Consumer Goods ETF (SZK) entered into oversold territory, changing hands as low as $38.411 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 Proshares UltraShort Consumer Goods, the RSI reading has hit 28.4 — by comparison, the RSI reading for the S&P 500 is currently 68.4. A bullish investor could look at SZK'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), SZK's low point in its 52 week range is $38.411 per share, with $70.07 as the 52 week high point — that compares with a last trade of $38.41. Proshares UltraShort Consumer Goods shares are currently trading off about 4.7% on the day.