KEY
TAKEAWAYS
- Price and breadth fell to extremes in early April as the market panicked.
- These extremes produced an oversold bounce, but this is still within a bear market.
- Follow through is what separates bear market bounces from bullish breadth thrusts.

3 Standard Deviation Decline
The chart below shows SPY dipping below the lower Bollinger Band (200,3) on April 4th. This means SPY was more than 3 standard deviations below its 200-day SMA, which is an extreme oversold condition. For reference, SPY has reached this extreme 27 times in the last 25 years. Such a move reflects panic selling pressure that often gives way to a bounce, which we got on Wednesday, April 9th.
TrendInvestorPro highlighted this 3 standard deviation move and extreme oversold conditions in our reports on April 7th and 8th. Click here to learn more and gain immediate access.
Oversold Extremes for Long-term Breadth
The next chart shows S&P 500 Percent Above 200-day SMA ($SPXA200R) dipping below 20% on April 7th to become extremely oversold. This means more than 80% of S&P 500 stocks were below their 200-day SMAs as traders sold pretty much everything. Extremely oversold readings in long-term breadth foreshadowed bounces June 2022, September 2022 and April 2025.
NYSE Zweig Breadth Thrust Sets Up
The NYSE Zweig Breadth Thrust is setting up as it finished below .40 on Friday. Actually, this indicator has been below .40 for four of the last five days. Readings below .40 reflect a short-term oversold condition that could give way to a bounce. The indicator first dipped below .40 on April 4th and stocks rebounded last week.
This indicator is also setting up for a possible Zweig Breadth Thrust. Currently, stocks are in the midst of an oversold bounce within a bigger downtrend. This would become a bullish Zweig Breadth Thrust should we see follow through and surge above .615 with 10 days. The countdown begins.
The Zweig Breadth Thrust indicator is the 10-day EMA of Advances/(Advances + Declines). Why did Zweig use a 10-day EMA? I believe he wanted to separate 1-5 day bear market bounces from bounces with follow through. The current bounce is just a bear market bounce and we need to see follow through within 10 days for a Zweig Breadth Thrust to trigger.
It is important to monitor more than one breadth indicator for thrust signals because you never know which one will trigger. The NYSE Zweig Breadth Thrust might miss, but the S&P 500 or S&P 1500 Zweig Breadth Thrust indicators may catch the signal, especially if Nasdaq stocks or small and mid caps lead. TrendInvestorPro monitors thrust indicators based on the percentage of stocks above their 20 and 50 day SMAs, and we have a breadth thrust index that aggregates thrust signals in over a dozen breadth indicators. This analysis continues for subscribers to TrendInvestorPro.Â
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Arthur Hill, CMT
Chief Technical Strategist, TrendInvestorPro.com
Author, Define the Trend and Trade the Trend
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Arthur Hill, CMT, is the Chief Technical Strategist at TrendInvestorPro.com. Focusing predominantly on US equities and ETFs, his systematic approach of identifying trend, finding signals within the trend, and setting key price levels has made him an esteemed market technician. Arthur has written articles for numerous financial publications including Barrons and Stocks & Commodities Magazine. In addition to his Chartered Market Technician (CMT) designation, he holds an MBA from the Cass Business School at City University in London.
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