Bat Pattern — what it is and how to use it in trading
Definition
The Bat pattern is a harmonic XABCD figure similar to the Gartley, but with a deeper point D relative to the starting point X. The name comes from the figure's characteristic shape, resembling a bat's silhouette.
How it works in the builder
Computed the same way as a Gartley — bat_bullish/bat_bearish with left/right/tolerance parameters — but against a different set of reference Fibonacci ratios between points X-A-B-C-D, which places point D deeper.
What it looks like on the chart
Visually the figure is almost indistinguishable from a Gartley in overall shape — the difference only shows up in the levels where point D sits relative to X-A.
Typical use
Like a Gartley, it's used as an entry zone at point D against the direction of the last leg. It is often combined with another harmonic pattern or a divergence as a filter, since the shape alone says nothing about the strength of the move that follows.
Common pitfalls
Bat and Gartley use overlapping ratio ranges — with a wide tolerance the same section of a chart can qualify as both a Bat and a Gartley at once. That isn't a builder bug, it's a consequence of how close the underlying ratios really are.
This block is available in the strategy builder
137 no-code blocks — build an entry condition with this term and test it on history
Historical results do not guarantee future ones. The service is an informational and analytical tool, not an individual investment recommendation; trades are not executed.