I've noticed that in the trading community, harmonic patterns are being discussed more and more, and the Bat pattern is especially popular. Honestly, when I first heard the name, I also smiled — it sounds funny. But behind it is a serious technical tool developed by Scott M. Carney.

What's the essence? The Bat pattern is a harmonic price formation consisting of four waves with five key points: X, A, B, C, and D. The structure is based on Fibonacci ratios, allowing traders to forecast where the price might go next. Two waves here are impulsive (XA and CD), and two are corrective (AB and BC). It resembles the Gartley pattern but with different proportions.

Now, how to use it. When the price forms three waves that start to resemble this pattern, you should apply the harmonic analysis tool on the platform and project point D. It usually should be located at the 88.6% retracement level of the XA move. This is called PRZ — the Potential Reversal Zone.

The criteria are simple: wave AB is a correction of XA by 38.2% or 50%, wave BC is a correction of AB by 38.2% or 88.6%. If BC is 38.2%, then CD should be 161.8% of BC. If BC is 88.6%, then CD is expected around 261.8%. In both cases, CD represents a retracement of about 88.6% of the entire XA move.

When the price reaches zone D, smart traders look for reversal signals: engulfing candle, pin bar, RSI divergence, or other oversold indicators. In a bullish pattern, they open a long position; in a bearish one, a short. The stop-loss is placed beyond point X, and profits are taken in several tranches: 38.2% retracement of CD, then 61.8%, and the third target often coincides with level C.

On what timeframe to trade? Many prefer hourly, 4-hour, or daily candles, but there’s no universal answer. You need to test yourself.

Here’s where it gets interesting. Honestly? Testing the Bat pattern on historical data with objective rules is a complex task. Zigzag indicators, which are usually used, tend to lag and are often unreliable. And that’s the main problem: many traders spend time on chart patterns they’ve never tested on historical data. How can you know if a pattern is profitable if you don’t backtest it?

My view: trading isn’t about one or two subjective patterns; it’s a portfolio of proven strategies. Yes, the pattern might have worked in the past, but without data, it’s just guessing. If it didn’t show results on historical data, it’s better not to waste time. You need a system, not hope for a pretty chart.