crab pattern

The Crab Pattern, like its cousins the Gartley, Bat and Butterfly, offers early warnings of potentially significant reversals in price trends.  Like the others, it’s considered to be successful about 70% of the time.  Combined with sound trade management technique, it can provide significant returns with limited risk.


Crabs, like all harmonic patterns, feature a precise series of coiling retracements  — failures to retake the previous highs and lows.  Unlike the Gartley and Bat, however, Crabs surge higher than the price level that starts the pattern before reversing, usually to 1.618X the price range previously established.

For an example of how Crab patterns work we’ll look at this past January.  On January 23, 2012, SPX had gained 45 points in the previous five sessions, and seemed ready for a pause.  It opened strong that morning, a continuation of the overnight ramp job in the futures, but on negative divergence.

Sure enough, it fell 16 points by the following morning, completing an a-b-c move and tagging a low of 1306.06.  It bounced hard off 1306, and attempted to regain its recent high.  But, it failed just past the .618 fib level at 1316.63 and fell back towards its recent low.  Here, it failed again, putting in a higher low and heading back up again.

At this point, we had a Point X (the origin of the pattern at 1322.28), a Point A (the 1306.60 low), and a retrace to Point Bat 1316.63.  It reversed here, putting in a Point B that was in the required range of a .382 to .886 retrace of the XA decline.  Some prefer a Point B below the .618 retrace, but many (including myself) believe a reversal at up to the .886 is perfectly all right.

After the reversal, we saw a Point C in the required range of .382 – 886 retrace of AB, and started heading higher.  Point B was only slightly higher than the .618 retrace, so there was a possibility that we were working on a Gartley or Bat.

Remember, a Gartley Pattern requires a reversal at the .618 and plays out to the .786.  A Bat features a reversal below the .618 and completes at the .886.   Given a reversal this close to the .618, many traders would attempt to play each prospective pattern as it came along.  We’ll save a discussion of various strategies for another post.

Suffice it to say that after SPX cleared the original Point X, a reversal at the 1.618 extension was definitely in the cards.  We saw a slight pause at the 1.272 — where a Butterfly sometimes reverses — and reached the 1.618 when we gapped open the following morning.  Because the final surge was so strong, we overshot by 1.17 — reaching 1333.47 versus our Point D target of 1332.30.

Like all Crab Patterns, the degree of the reversal is a function of many other factors.  The strongest reversals are those that take prices in the same direction in which the market was already trending.   But, in general, we look for a move of .618 of the AD price distance.  Beyond that, we look for other Fib levels such as .786, 1.272, 1.618, etc.   They’re charted below in yellow.

In this instance, we reached the .618 level at 1316.53 a few hours later, bounced at the .786 at 1311 and continued to 1300, very close to the 1.272 Fib level.  All in all, we had a 33-point move off the 1333 high — about 2.5%.  For an active trader, a 33-point move opens up some very profitable opportunities.  However, it’s often difficult to forecast the degree of the move, so many traders play the reversal and get out once a modest profit is in hand.

We had a little help in anticipating the degree of this reversal because once we reached and reversed at the .786 on the way down, there was a possibility that we’d go on and complete a Butterfly pattern that normally extends to the 1.272 or 1.618.  In fact, that’s exactly what happened.  For the rest of the story, check out Butterfly Patterns.