Advertisement
Advertisement

S&P 500 Index Forecast: Bullish Trend Holds as Bullish Percent Index Weakens

By
Cedric Thompson
Published: May 18, 2026, 21:00 GMT+00:00

Key Points:

  • S&P 500 Momentum is cooling after a strong rally, with the weekly chart stalling near the 1.618 Fibonacci extension around 7,445-7,450 and the daily chart moving closer to its 21-EMA.
  • Market breadth has deteriorated, with the S&P 500 Bullish Percent Index falling below 50.
  • The trend is bullish but cracks are showing with the Renko 50-SMA and 21-day EMA acting as support. A hold above these indicators with a change in breadth will keep 8,150 alive, while a break below these indicators will lead me to change my view on the current trend direction.

NAHB Housing Index Beats Forecast But Stays Weak

There’s a small surprise on this red day with the NAHB HOusing Market Index coming in at 37, better than the 34 forecast and above the prior 35. But it’s still below 50 so builders overall are seeing conditions as poor rather than good. This Index has been stuck in the mid-high 30s for months so there’s alot more room to go here.

NAHB Housing Market Index Rises to 37 in May, Beating the 34 Forecast But Remaining Well Below the 50 Expansion Line

Bar chart showing the NAHB/Wells Fargo Housing Market Index at 37 in May 2026 versus a 34 forecast and 35 prior reading,. With builder sentiment still below 50. Source: TradingView

S&P 500 Weekly Chart Stalls Near 1.618 Extension

That long upper wick on the S&P 500 weekly chart isn’t enticing me to go long. Worse yet, it was near the 1.618 Fibonacci extension. So the bulls hit their target it seems. And now they might be going for a rest. We will need to see how the Index behaves around 7,240 support. If it closes below there my view on trend will turn to neutral.

S&P 500 Weekly Chart Shows Price Pausing Near the 1.618 Fibonacci Extension as Supertrend Support Rises Beneath the Rally

Weekly S&P 500 Index chart showing price near 7,369, resistance around the 7,445 Fibonacci extension, short Supertrend support near 7,244, and long Supertrend support near 6,779. Source: TradingView

S&P 500 Daily Chart Holds ABove 21-EMA as Momentum Cools

The Index is still above its 21-day EMA but the price is getting closer and closer to it. This will mark the first test since it crossed over the EMA in early April. The RSI crossed under the overbought level and is heading lower, which is another sign that the Index will continue to pull back. We need to see how it behaves around the 21-EMA.

S&P 500 Daily Chart Shows The Index Easing From Recent Highs While Staying Above the Rising 21-EMA

Daily S&P 500 Index chart showing price near 7,373, the 21-EMA near 7,261, RSI around 63, and a recent pullback after a strong rally from 6,311. Source: TradingView

S&P 500 Breadth Breaks Below 50 as Rally Loses Participation

This isn’t a good sign. Not good at all. A BPSPX cross below 50 has been followed by a negative S&P 500 return 43.27% of the time over the 10-15 day window, with median losses of -3.21% to -3.59%. Moreover, when weakness persists, the median downside has been deeper over longer horizons, including -9.10% over 6 months, -11.49% over 9 months, and -14.01% over a year.

So we need to be wary here.

S&P 500 Bullish Percent Index Slips to 46.8, Signaling Weaker Market Breadth Even As Major Indices Remain Near Recent Highs

StockCharts Chart showing the S&P 500 Bullish Percent Index falling below the 50 threshold to 46.8, with the Nasdaq Composite pulling back from recent highs Source: StockCharts

S&P 500 Renko Pullback Tests Medium Term Support

After such a strong rally and making all time highs the S&P 500 Index is now having a bit of a pullback as it seems the bulls are a bit exhausted. So consolidation is needed for the Index. The Supertrend has flipped to negative and the 50-SMA is now acting as support for the Index. The RSI is trending lower and is testing its 50 level while the Z-Score SMA is also trend lower but not yet exhausted either. We’ll need to see how the S&P 500 Index behaves around its 50-SMA.

S&P 500 20-Brick Renko Shows A Cooling Rally As Price Slips Below Supertrend Resistance But Remains Above the 50-SMA

S&P 500 Index 20-brick Renko with price near 7,380, RSI around 49, Z-Score SMA near -0.8, and support above the 50-SMA at 7,311. Source: TradingView

The Verdict

Current Trend Direction: Bullish

Bias: Positive

Support Levels: 7,240, 6,775

Resistance Levels: 7,450, 8,150

Medium Term Path: I am cautiously optimistic here as there’s deterioration in medium term market breadth. The structure across the multiple timeframes hasn’t collapsed outright and the VIX is still below 20 so that still tells me that this may just be a slight pullback rather than a huge correction or even a bear market. The signs aren’t there. As yet.

About the Author

Cedric Thompson, CMT, CFA, is an investment strategist with experience in asset management, corporate strategy, and multi-asset investing.

Advertisement