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Source: backtest.substack.com​

SPY Short-Term Forecast and Trading Outlook for Tuesday, Oct 21, 2025

10/20/2025

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The forecast posted yesterday was spot on. Bearish sentiment has been hanging over this market since the big red bar in the market on October 10th. Trading inside that bar just didn't look bullish. But, the undercurrents of the forecast algo nailed it again. Look for a video soon on how to use the gauge and some of the components that make it up. 

After today's rally the readings have moderated a bit, but generally bullish. I also noted the 10 day window rolled negative. We will have to keep an eye on that as the next few days unfold.
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    Dave Johnson

    I'm Dave Johnson, a former investment advisor and quantitative system developer with over 30 years of experience building and trading mechanical systems. These days I focus on rules-based research, honest backtests, and sharing what the data actually shows.

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