In trading on Tuesday, shares of the NASDAQ China Technology ETF ( QQQC) entered into oversold territory, changing hands as low as $21.2415 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 NASDAQ China Technology, the RSI reading has hit 29.9 — by comparison, the RSI reading for the S&P 500 is currently 51.5. A bullish investor could look at QQQC's 29.9 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), QQQC's low point in its 52 week range is $19.81 per share, with $25.00 as the 52 week high point — that compares with a last trade of $21.35. NASDAQ China Technology shares are currently trading down about 1.6% on the day.