As of May 1, 2024, two stocks in the materials sector could be flashing a real warning to investors who value momentum as a key criteria in their trading decisions.

The RSI is a momentum indicator, which compares a stock's strength on days when prices go up to its strength on days when prices go down. When compared to a stock's price action, it can give traders a better sense of how a stock may perform in the short term. An asset is typically considered overbought when the RSI is above 70, according to Benzinga Pro.

Here's the latest list of major overbought players in this sector.

Hongli Group Inc. (NASDAQ:HLP)

• The company's stock gained around 32% over the past five days and has a 52-week high of $5.54 .
• RSI Value: 74.46
• HLP Price Action: Shares of Hongli Group closed at $1.77 on Tuesday.

Northern Technologies International Corporation (NASDAQ:NTIC)

• On April 11, Northern Technologies International reported better-than-expected second-quarter adjusted EPS results. "NTIC set a series of new records in the second quarter, driven by robust demand across many parts of our business. Most notable among these were record second quarter ZERUST oil and gas sales and record quarterly Natur-Tec sales. The positive momentum underway within these two sectors reflects our long-standing commitment to developing innovative solutions for large, rapidly growing markets that are supported by NTIC's global infrastructure," said G. Patrick Lynch, President and CEO of NTIC. The company's stock gained around 34% over the past month and has a 52-week high of $17.76.
• RSI Value: 73.46
• NTIC Price Action: Shares of Northern Technologies International gained 1.5% to close at $17.70 on Tuesday.

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