Market achieves 75% upside day at 11am, Walter Deemer notes

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Andrey Mastykin

17.04.2026

Market achieves 75% upside day at 11am, Walter Deemer notes — U.S. market posts 75% upside

A sharp surge occurred in the U.S. stock market with a 75% upside day recorded at 11am, according to data cited by Walter Deemer. The calculation is based on the UVOL/(UVOL+DVOL) ratio using Lowry’s definition.

Deemer also referred readers to additional links for methodological context. The tweet invoked a quote from 'Mr. Market' alluding to significant market movement without reaching a 90% upside day.

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The tweet was deleted by the author.

But we saved everything 🙂.

Deemer recently identified 657.03 as a key gap level for SPY, observing that trading above this threshold could trigger a breakaway move in the index, according to a previous note. In a separate instance, he described a 67 percent downside day as insignificant and pointed out that the QQQ index had not rallied to fill its gap at 585.69, as outlined in an earlier report. These observations form part of Deemer’s ongoing tracking of notable levels and volume-based market shifts.

This material may contain third-party opinions, none of the data and information on this webpage constitutes investment advice according to our Disclaimer. While we adhere to strict Editorial Integrity, this post may contain references to products from our partners.

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