# Shark Back & Shark Tail {% hint style="success" %} Learn the basics of [Harmonic Patterns](/fundamentals/harmonic-patterns.md). {% endhint %} AlgoBox™ Shark Back and Shark Tail strategies are Harmonic Patterns based on Fibonacci retracements, extensions and projections of price structure, which can indicate a Potential Reversal Zone (PRZ).

AlgoBox™ automatically, instantly and continually plots harmonic patterns so you don't have to, saving you time and mental capital.

## Shark Back

The rectangular boxes are the PRZ or "Potential Reversal Zone" for each Harmonic Pattern. The "farthest" line inside the PRZ indicates the optimal entry location for a Shark Back setup:

An example of a red Shark Back (bearish). Price touches the optimal entry line, pivots and drops.

## Shark Tail A Shark Tail setup is a multi-confluence strategy that consists of a Shark harmonic with one of the following appearing behind the PRZ:
* [FlowMaster™ Alpha Omega](/fundamentals/flowmaster-tm-alpha-omega.md) * [FlowMaster™ Enigma](/fundamentals/flowmaster-tm-enigma.md) * [FlowMaster™ Cross](/fundamentals/flowmaster-tm-cross.md) * [FibElliDott](/fundamentals/fibellidott.md)

An example of a green Shark Back with a Flowmaster™ Cross appearing behind the Shark PRZ, making this a Shark Tail setup.

An ideal entry would be as soon as possible after a FibDot or Cross appears.

An example of a green Shark harmonic with a FlowMaster™ Alpha appearing behind the Shark PRZ, making this a Power Shark Tail.

Utilize AlgoBox™ ATM strategies to assist in automatically placing stops and targets according to your desired parameters.

An example of a green Shark harmonic with a 🟢 green FibElliDott, making this a bullish Shark Tail.

{% hint style="info" %} Reminder: We generally use [4 types of stops](/essential-tips-and-techniques/4-types-of-stop-losses.md): Dot, Cross, Box, & Triangle. {% endhint %}

An example of a red Shark harmonic with a FlowMaster™ Omega appearing behind the PRZ, making this a bearish Shark Tail.

Ideal stop losses for Shark Backs are behind the PRZ box.

Another example of a bearish Shark Tail. A Shark harmonic with a Flowmaster™ Cross appearing just behind the PRZ.

Ideal stop losses for Shark Tails are behind the Cross or Dot.

An example of a red Shark harmonic with a 🔴 bright red FibElliDott appearing just behind the PRZ box, making this a bearish Shark Tail.

Sharks are statistically the most powerful harmonic pattern, but just like any other trading signal, they are not 100% accurate 100% of the time. "Trade Nothing Alone"

HMD: A green Shark harmonic gets pierced, then a 🔴 bright red FibElliDott appears, hinting at continuation to the downside.

{% hint style="info" %} Break: When price continues through the back of a harmonic pattern's PRZ, it is considered a break of the harmonic structure. {% endhint %}

An example of a red Shark harmonic with a 🟢 dark green FibElliDott signaling continuation to the upside.

An example of a bearish Shark Tail. A Shark harmonic with a red FlowMaster™ Enigma appearing just behind the PRZ.

Another example of a bullish Shark Tail. A Shark harmonic with a green FlowMaster™ Enigma appearing just behind the PRZ.

The Shark Tail strategy combines market structure geometry with Real Time Order Flow Analysis (RTOFA), making it a powerful addition to your trading analysis. *** ## Shark Back & Shark Tail Examples

STUDY: On the AlgoBars 3 chart of YM futures, a Shark PRZ appears at King Timing and then a 🔴 red FibDot appears to complete the Shark Tail strategy for a swift move down.

WATCH: On the AlgoBars 1 chart of YM futures, a green Shark Harmonic appears at King Timing - targets filled as a Delta Shift occurs.

*** ## Video Tutorials: Shark Back & Shark Tail {% embed url="" %} WATCH: This concise video explains the Shark Back and Shark Tail strategies and their differences in detail. {% endembed %} {% embed url="" %} WATCH: Vinny E. Mini teaches the Shark Back and Shark Tail strategies in this video tutorial. {% endembed %} *** Only available on AlgoBox™ for NinjaTrader 8. [Try AlgoBox™ for free today.](https://www.algoboxpro.com/start-trial) [**Disclaimer**](/links/disclaimer.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.algoboxpro.com/strategies/shark-back-and-shark-tail.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.