Classic Crab Harmonic Pattern Indicator Download for MetaTrader 5 – Free – [TFlab] – MT4/MT5 Resource

On July 1, 2025, in version 2, the indicator added alerts/notifications and signals functionality

The classic Crab harmonic pattern is one of the most widely used patterns for technical analysis which was developed by Scott Carney in 2000.

Using Fibonacci ratios , this pattern identifies price reversal zones and is favored by traders for its favorable risk-reward ratio .

The Classic Crab Harmonic Pattern Indicator for MetaTrader 5 is designed to automatically detect this pattern on price charts .

This MT5 classic chart pattern indicator identifies key points X , A , B , C , and D , displaying bullish patterns in pink and bearish patterns in blue .

Classic Crab Harmonic Mode Indicator Table

The following table summarizes the features of the Classic Crab Harmonic Pattern indicator :

Indicators at a glance

In this MT5 Harmonic Pattern Indicator , Fibonacci ratios are used as the key factor in identifying the Price Reversal Zone (PRZ) :

• AB wave : retracement between 38.2% to 61.8% of XA
• BC wave : Retracement to either position 38.2% or 88.6% of AB
• CD wave : If BC retraces 38.2% , the CD wave extends to 224% of it
• Wave CD relative to XA : It should form 161.8% of XA, making point D a potential Price Reversal Zone (PRZ)

Indicators are in an upward trend

In the CHF/JPY price chart , the Classic Crab Harmonic Pattern indicator automatically identifies Price Reversal Zones (PRZs) and displays them on the chart.

At point D , the price trend turns upward , confirming a price reversal from this level.

Indicators are in a downward trend

In the USD/CAD 5-minute chart , the indicator identifies an upward Crab pattern .

Traders can enter a buy position after receiving reversal confirmation, placing a stop-loss before the PRZ area .

Classic Crab Harmonic Mode Indicator Settings

Set to the classic Crab Harmonic Pattern indicator are shown below:

• Minimum Wavelength (Candles) : Minimum wavelength expressed in number of candles
• Number of previous candles : number of previous candles used for analysis
• Show Lines : Show or hide pattern lines
• BreakPivot : Check if the pivot is broken
• Original Pivot to Broken Pivot (Pipette) : The distance between the original pivot and the broken pivot (in points)
• Shift : The amount of data change on the chart
• BullishPattern : Identify Bullish Harmonic Patterns
• BearishPattern : Identify bearish harmonic patterns
• Style Of Line : Set the style of the lines on the chart
• Width Of Line : Set the thickness of the displayed line
• Custom Color Lines (Bearish Harmonic) : Change the color of the bearish pattern lines
• Custom Color Lines (Bullish Harmonic) : Customize the color of the bullish pattern lines
• Custom text color : Set the color of displayed text

Conclusion

Using the classic Crab Harmonic Pattern indicator , traders can automatically detect the Crab Harmonic Pattern on price charts on Forex currency pairs and other financial markets.

The Crab pattern has both bullish and bearish structures based on the price direction formed on the chart. In the bullish pattern , after reaching point D , the price may increase, while in the bearish pattern , a decrease in price can be expected from point D.