In trading on Thursday, shares of the iShares MSCI Global Metals & Mining Producers ETF (PICK) entered into oversold territory, changing hands as low as $13.9499 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 iShares MSCI Global Metals & Mining Producers, the RSI reading has hit 22.8 — by comparison, the RSI reading for the S&P 500 is currently 53.8. A bullish investor could look at PICK's 22.8 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), PICK's low point in its 52 week range is $13.9499 per share, with $21.80 as the 52 week high point — that compares with a last trade of $14.06. iShares MSCI Global Metals & Mining Producers shares are currently trading off about 7.9% on the day.