In trading on Monday, shares of the Poland ETF (PLND) entered into oversold territory, changing hands as low as $17.52 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 Poland, the RSI reading has hit 29.3 — by comparison, the RSI reading for the S&P 500 is currently 43.9. A bullish investor could look at PLND's 29.3 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), PLND's low point in its 52 week range is $16.41 per share, with $23.10 as the 52 week high point — that compares with a last trade of $17.58. Poland shares are currently trading off about 2.7% on the day.