Alternate Bat pattern
A Bat variant with a very shallow B at 38.2% and D reaching 113% of XA, just past the start.
What it shows
The Alternate Bat has a B point at only 38.2% of XA. D lands at 113% of XA, so it goes slightly beyond X. That is the main difference from the Bat.
It is a variant, so its rules are less standardized than the main patterns.
How we find it
The same code that draws it on your chart follows these steps, with the same result every time.
- Find five alternating swing points X, A, B, C, D.
- B must be about 38.2% of XA.
- C must be 38.2% to 88.6% of AB.
- D must be about 113% of XA (±5%), beyond X.
Starting values: Ratio tolerance ±5%; B 38.2% of XA; D 113% of XA. These are proposed and will be tuned on real price data before launch.
How to read it
- B is shallow.
- D sits just beyond X.
- Dashed lines show the ratio triangles.
Status labels you may see
| Label | What it means |
|---|---|
| Pattern forming | Points X through C match, D has not been reached. |
| Pattern complete | D matches the ratio rule. |
What cancels it
A close well beyond D (more than 5% past it).
What traders check next
- How far D went past X.
- What happened at D.
- Whether other levels agree with D.
Limits
- Less standardized than the Bat.
- D beyond X means the pattern has a looser stop idea.
- Rarely tested in research.
Try it in forecastviz
- Open any ticker and choose Fibonacci and harmonic patterns → Alternate Bat pattern in the left menu.
- Switch between 6M, 1Y, 3Y to see how the picture changes.
- Compare with Bat pattern and Gartley pattern on the same chart.
Questions
How is it different from the Bat?
The Alternate Bat has a shallower B and a D that goes past X.
Is it common?
It is less common than the main patterns.
Related trends
Further reading
- Boroden, Fibonacci Trading
- Carney, Harmonic Trading
- Murphy, Technical Analysis of the Financial Markets
Educational only. Not financial advice, and not a price forecast. Charts are drawn by code from past price data, which may be delayed.