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Thomas Bulkowski’s successful investment activities allowed him to retire at age 36. He is an internationally known author and trader with 30+ years of stock market experience and widely regarded as a leading expert on chart patterns. He may be reached at

Support this site! Clicking on his books (below) takes you to If you buy ANYTHING, they pay for the referral.

Bulkowski's Event Pattern Resource

Class Elliott Wave Fundamentals Psychology Quiz Research Setups Software Tutorials More...
Candles Chart
Small Patterns
Industrials (^DJI):
Transports (^DJT):
Utilities (^DJU):
Nasdaq (^IXIC):
S&P500 (^GSPC):
As of 05/21/2015
18,286 0.34 0.0%
8,551 47.32 0.6%
589 -0.06 0.0%
5,091 19.05 0.4%
2,131 4.97 0.2%
Tom's Targets    Overview: 05/14/2015
18,600 or 17,700 by 06/01/2015
9,000 or 8,200 by 06/01/2015
610 or 565 by 06/01/2015
5,200 or 4,825 by 06/01/2015
2,150 or 2,050 by 06/01/2015
Mutt Losers: None YTD

Written by and copyright © 2005-2014 by Thomas N. Bulkowski. All rights reserved.

My book, Encyclopedia of Chart Patterns, has 53 chart patterns and 10 event patterns described including performance statistics.

If you click on this link and then buy the book (or anything) at, the referral will help support this site. Thanks. -- Tom Bulkowski

$ $ $

Event patterns are price patterns caused by significant events that affect securities. Events such as earnings releases, Dutch auction tender offers, stock broker rating upgrades and downgrades, I call event patterns. This page serves as the gateway to examining those patterns and how to trade them.

Event patterns have failure rates that are often significantly higher than your average chart pattern. For example, an Eve & Eve double bottom chart pattern has a bull market break even failure rate of 4%. The earnings flag event pattern has a 10% failure rate. A good earning surprise event pattern has a 29% failure rate. Ouch!

Despite the high failure rates, traders should know how to recover from or take advantage of event patterns. That is what the below links discuss.

Latest Releases

  • July 29, 2010: Stock splits. What happens to price before and after a stock split? Find out.


  1. Common stock offerings.
  2. Dead-cat bounce
  3. Dead-cat bounce, inverted
  4. Dutch auction tender offers
  5. Earnings surprise, bad
  6. Earnings surprise, good
  7. Earnings flag
  8. FDA drug approvals
  9. Same-store sales, bad
  10. Same-store sales, good
  11. Stock splits
  12. Stock rating downgrades
  13. Stock rating upgrades

-- Thomas Bulkowski

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Copyright © 2005-2014 by Thomas N. Bulkowski. All rights reserved. Eat well, stay fit, die anyway.