Read more about the article NTAP +542%: the base breakout that ran with the Nasdaq, August 1999
NTAP on the 1999-08-12 breakout entry, from my chart archive

NTAP +542%: the base breakout that ran with the Nasdaq, August 1999

NTAP is back on traders' screens this week, in the days after its latest quarterly report, so it's worth pulling an old chart back up and reading it properly. The…

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Trade Sign Classification: How Order Flow Gets Signed

Pull a single day of time and sales for any active stock and you'll get a tidy column of prints: a price, a size, a timestamp, sometimes a venue code.…

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Liquidity Resilience: How Markets Rebuild Their Depth

A single market order can strip the visible book in a blink. Picture the best offer showing 4,000 shares, and then a buyer lifts 12,000 in one print. The top…

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Opening and Closing Auctions: How the Single Price Forms

The last number printed on a chart at the close is the one everybody quotes. It sets the daily candle, the mark on your brokerage statement, the figure a fund…

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Hawkes Process: Why Market Events Arrive in Clusters

Watch a fast tape for a few minutes and the rhythm gives itself away. Trades, quote changes, and cancellations don't arrive like a metronome. The book goes quiet, then a…

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Event Study: How to Read Abnormal Returns From News

A headline crosses the wire: a stock "jumped 4% after earnings." It reads like a clean reaction, cause and effect in one line. Then you pull up the tape and…

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Log Returns vs Simple Returns: What Traders Must Know

A stock closes up 10 percent on Monday and down 10 percent on Tuesday. Add the two moves and you get zero, so the week looks like a wash. The…

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Read more about the article ZM +370%: the leader’s base breakout, February 2020
ZM on the 2020-02-18 breakout entry, from my chart archive

ZM +370%: the leader’s base breakout, February 2020

By mid-February 2020, Zoom Video Communications had spent almost a year grinding sideways after its IPO pop, and then it stopped grinding. On 18 February 2020 the stock closed at…

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Multiple Testing in Trading Research: When a Signal Lies

Picture a moving-average crossover you're testing. You try fast lengths from 5 to 50, slow lengths from 20 to 200, three different exit rules, and four separate stock universes. Somewhere…

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Read more about the article EH +265%: anatomy of a base breakout, November 2020
EH on the 2020-11-23 breakout entry, from my chart archive

EH +265%: anatomy of a base breakout, November 2020

EHang, ticker EH, is back on traders' screens this week. The Chinese eVTOL maker posted its second-quarter 2026 results on 25 August, per the company's own release, and the stock…

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