In trading on Tuesday, shares of the WisdomTree International MidCap Dividend Fund ETF ( DIM) entered into oversold territory, changing hands as low as $58.32 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 WisdomTree International MidCap Dividend Fund, the RSI reading has hit 28.5 — by comparison, the RSI reading for the S&P 500 is currently 56.6. A bullish investor could look at DIM's 28.5 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), DIM's low point in its 52 week range is $55.19 per share, with $63.15 as the 52 week high point — that compares with a last trade of $58.45. WisdomTree International MidCap Dividend Fund shares are currently trading off about 0.9% on the day.