In trading on Thursday, shares of RTI International Metals, Inc. ( RTI) entered into oversold territory, changing hands as low as $28.18 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 RTI International Metals, Inc., the RSI reading has hit 28.2 — by comparison, the universe of metals and mining stocks covered by Metals Channel currently has an average RSI of 54.6, the RSI of Spot Gold is at 68.5, and the RSI of Spot Silver is presently 58.3. A bullish investor could look at RTI's 28.2 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), RTI's low point in its 52 week range is $26.05 per share, with $36.09 as the 52 week high point — that compares with a last trade of $28.40. RTI International Metals, Inc. shares are currently trading off about 4.6% on the day. According to the ETF Finder at ETF Channel, RTI makes up 5.53% of the Rare Earth/Strategic Metals ETF ( REMX) which is trading higher by about 1.1% on the day Thursday.