Bump and Run Reversal
Last updated
Last updated
© StockCharts.com, Inc. All Rights Reserved.
As the name implies, the Bump and Run Reversal (BARR) is a reversal pattern that forms after excessive speculation drives prices up too far, too fast. Developed by Thomas Bulkowski, the pattern was introduced in the June-97 issue of Technical Analysis of Stocks and Commodities and included in his book, the Encyclopedia of Chart Patterns.
The pattern was originally named the Bump and Run Formation, or BARF. Bulkowski decided that Wall Street was not ready for such an acronym and changed the name to Bump and Run Reversal. Bulkowski identified three main phases to the pattern: lead-in, bump, and run. We will examine these phases and also look at volume and pattern validation.
Lead-in Phase. The first part of the pattern is a lead-in phase that can last one month or longer and forms the basis for drawing the trend line. The price advance will be orderly during this phase, and no excess speculation will exist. The trend line should be moderately steep. If it's too steep, the ensuing bump is unlikely to be significant enough. If the trend line is not steep enough, then the subsequent trend line break will occur too late. Bulkowski advises that an angle of 30 to 45 degrees is preferable. The angle size will depend on the scaling (semi-log or arithmetic) and the chart size. It's probably easier to judge the soundness of the trend line with a visual assessment.
Bump Phase. The bump forms with a sharp advance, and prices move further away from the lead-in trend line. Ideally, the angle of the trend line from the bump's advance should be about 50% greater than the angle of the trend line extending up from the lead-in phase. Roughly speaking, this would call for an angle between 45 and 60 degrees. If measuring the angles is impossible, then a visual assessment will suffice.
Bump Validity. The bump must represent a speculative advance that cannot be sustained for long. Bulkowski developed an “arbitrary” measuring technique to validate the level of speculation in the bump. The distance from the highest high of the bump to the lead-in trend line should be at least twice the distance from the highest high in the lead-in phase to the lead-in trend line. These distances can be measured by drawing a vertical line from the highest highs to the lead-in trend line. An example can be seen in the chart below.
Bump Rollover. After speculation dies down, prices peak, and a top forms. Sometimes, a small double top or a series of descending peaks forms instead. Prices decline toward the lead-in trend line, and the right side of the bump forms.
Volume. As the stock advances during the lead-in phase, volume is usually average and sometimes low. When the speculative advance begins to form the left side of the bump, volume expands as the advance accelerates.
Run Phase. The run phase begins when the pattern breaks support from the lead-in trend line. Prices will sometimes hesitate or bounce off the trend line before breaking through. Once the break occurs, the run phase takes over, and the decline continues.
Support Turns Resistance. After the trend line is broken, a retracement sometimes tests the renewed resistance level. Potential support-turned-resistance levels can also be identified from the reaction lows within the bump.
The Bump and Run Reversal pattern can be applied to daily, weekly, or monthly charts. As stated above, it is designed to identify long-term unsustainable speculative advances. Because prices rise quickly to form the bump's left side, the subsequent decline can be just as ferocious.
Level Three Communications (LVLT) formed a Bump and Run Reversal pattern after prices advanced in a speculative frenzy at the beginning of 2000. Prices advanced from 72 to 132 in 2 months and this advance ultimately proved unsustainable.
The lead-in phase formed over three months from early Oct 1999 to early Jan 2000. Volume during this phase was relatively subdued and declined during the November and December advance.
The trend line extending higher from the lead-in phase lows formed a 34-degree angle. A visual assessment also reveals that this trend line is neither too steep nor too flat.
The bump phase began in early January when the advance accelerated with a large increase in volume. A conservatively drawn trend line formed a 51-degree angle that was exactly 50% larger than the angle from the lead-in trend line.
The distance from the lead-in phase's highest high to the trend line was 13. The distance from the bump phase's highest high to the trend line was 38. This is almost three times larger and validates the speculative excesses in the bump.
After reaching a high of around $132, prices declined sharply and bounced off the lead-in trend line. A lower high formed around $115 (red arrow), and the trend line was soon broken.
The decline continued after the trend line break and reached $67 before a reaction rally began. The stock price advanced to around $95 during the reaction rally but fell just short of the horizontal support line before falling back to new lows.
