In trading on Tuesday, shares of the iShares MSCI Global Agriculture Producers ETF ( VEGI) entered into oversold territory, changing hands as low as $25.20 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 Agriculture Producers, the RSI reading has hit 25.9 — by comparison, the RSI reading for the S&P 500 is currently 61.4. A bullish investor could look at VEGI's 25.9 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), VEGI's low point in its 52 week range is $24.51 per share, with $28.66 as the 52 week high point — that compares with a last trade of $25.43. iShares MSCI Global Agriculture Producers shares are currently trading down about 3.7% on the day.