ABCD Pattern: What It Is and How to Trade It

Key Takeaways

• The ABCD pattern is a four point harmonic pattern with three legs, where the CD leg tends to match the AB leg.
• The BC retracement covers 38.2% to 88.6% of the AB leg, and it often lands near 61.8% or 78.6%.
• Two ratio pairs give a CD leg equal to the AB leg, which are 61.8% with 161.8% and 78.6% with 127.2%.
• A bullish ABCD pattern needs point C below A and point D below B, and a bearish ABCD pattern mirrors both rules.
• Point D alone is not a trade signal, so reversal traders wait for a reversal candle, volume or a support or resistance reaction.
• Reversal traders often place a stop loss just beyond point D, then target two CD leg retracements, point C and point A.
• Trend followers use the ABCD pattern differently, entering when the BC retracement ends at point C and trading the CD leg.
• The ABCD pattern can fail, because legs are rarely exact and false signals happen, so it never guarantees a reversal.

What Is the ABCD Pattern?

The ABCD pattern is a four point harmonic pattern made of three legs, where the CD leg tends to match the AB leg. Harmonic patterns are chart patterns that use Fibonacci ratios to measure price swings and show where price may turn. The ABCD pattern is the simplest of the harmonic patterns, with only points A, B, C and D.

The ABCD pattern is named after those four points. Traders also write the ABCD pattern as AB=CD, because the AB leg and the CD leg tend to be about the same length. On a chart, the three legs look like a lightning bolt or a zigzag.

Point D sits inside the potential reversal zone (PRZ), the area where price may turn. The ABCD pattern never predicts price, and a finished ABCD pattern can still fail.

The leg ratios decide whether a shape on a chart counts as an ABCD pattern, so each leg needs measuring.

ABCD Pattern Structure and Fibonacci Ratios

In an ABCD pattern, the BC retracement covers 38.2% to 88.6% of the AB leg, and the CD leg usually ends about equal to the AB leg.

• The AB leg is the first strong price swing, and the ABCD pattern is measured from its length.
• The BC retracement moves against the AB leg, and a Fibonacci retracement shows how much of the AB leg price gives back.
• The CD leg is the second price swing in the AB direction, and a Fibonacci extension of the BC retracement helps show where point D may land.

The ratios in the table come from Harmonic Trader, the site of Scott Carney. Ratios vary between sources, so this article uses one set.

A shallower BC retracement needs a larger Fibonacci extension to bring the CD leg back to the size of the AB leg. If the AB leg is 100 points and the BC retracement is 61.8 points, 161.8% of 61.8 is 100, so the CD leg equals the AB leg. A 78.6 point BC retracement gets there too, because 127.2% of 78.6 is also about 100.

The AB leg and the CD leg often take a similar time, and the legs are rarely exact. The CD leg can also run past the AB leg as an extension, and a large gap or big candles near point C can hint at that.

With the leg ratios set, the next job is finding an ABCD pattern on a chart.

How to Identify an ABCD Pattern on a Chart

To identify an ABCD pattern, find a clear AB price swing, confirm the BC retracement ratio, then project point D from point C.

1. Find a clear AB price swing, and skip small noise.
2. Check that the BC retracement ends at point C between 38.2% and 88.6% of the AB leg.
3. Project the CD leg from point C to the level where the CD leg equals the AB leg.
4. Mark the PRZ around point D, and check whether the PRZ lines up with support or resistance, which are levels where price has turned before.
5. Wait for confirmation in the PRZ before you plan a trade.

A zigzag indicator can help you mark the price swings. On MT4 and MT5, the same steps come down to two Fibonacci tools.

How to Draw the ABCD Pattern on MT4 and MT5

MT4 and MT5 list no ABCD tool, so draw the ABCD pattern with the Fibonacci Retracement and Fibonacci Expansion tools. The steps are near identical on both platforms.

1. Mark points A, B and C with the whole price swing in view.
2. Open the Fibonacci tools in the Insert menu, draw Fibonacci Retracement from point A to point B, and check where point C sits.
3. Add the 78.6% and 88.6% levels, which the default Fibonacci Retracement levels leave out. Select the drawn tool, right click, choose Properties, open the Fibo Levels tab on MT4 or the Levels tab on MT5, then press Add.
4. Draw Fibonacci Expansion, a three point tool, on points A, B and C. The 100% line marks where the CD leg equals the AB leg.
5. Draw Fibonacci Retracement from point B to point C, add 127.2% if the level is missing, and read the 127.2% and 161.8% levels past point B.

The B to C drawing matters because Fibonacci Expansion measures from the AB leg, so its 127.2% line is a different price from a 127.2% Fibonacci extension of the BC retracement. The drawing steps stay the same in both directions, but the point C and point D rules flip.

Bullish vs Bearish ABCD Pattern

A bullish ABCD pattern falls into point D and may turn up, while a bearish ABCD pattern rises into point D and may turn down. A bullish ABCD pattern moves down, up, down, and a bearish ABCD pattern moves up, down, up. The leg ratios stay the same in both forms.

Bullish ABCD Pattern

In a bullish ABCD pattern, point C stays below A and point D makes a new low below B. Price falls from point A to point B, retraces up to point C, then falls again to point D.

A point C above A means the BC retracement has gone past the 88.6% maximum, and a point D that holds above B has made no new low.

Reversal traders look for a long position, a trade that gains if price rises, after confirmation at point D.

Bearish ABCD Pattern

In a bearish ABCD pattern, point C stays above A and point D makes a new high above B. Price rises from point A to point B, retraces down to point C, then rises again to point D.

A point C below A means the BC retracement has gone past the 88.6% maximum, and a point D that holds below B has made no new high.

Reversal traders look for a short position, a trade that gains if price falls, after confirmation at point D. Both forms then need the same trade plan.

How to Trade the ABCD Pattern

To trade the ABCD pattern as a reversal, wait for point D, confirm the turn, then set your entry, stop loss and take profit targets. Trend following is a separate approach with its own entry rule.

How to Confirm an ABCD Pattern in the Potential Reversal Zone (PRZ)

Confirm an ABCD pattern by waiting for a reversal candle, volume or a support or resistance reaction in the PRZ. The PRZ is the area around point D, never one exact price, and point D alone is not a signal.

• A reversal candle closes against the direction of the CD leg, which shows price may be starting to turn in the PRZ.
• Rising volume near point D shows more traders are acting at that price.
• Support or resistance near point D gives price a level it has already reacted to.

A PRZ with two or three of those checks lined up gives a stronger case, but no check guarantees a reversal. Once the PRZ confirms the turn, the entry follows.

Where to Enter an ABCD Pattern Trade

For a reversal, enter after point D completes and the PRZ confirms the turn. In a bullish ABCD pattern, one common entry sits just above the reversal candle. In a bearish ABCD pattern, the same entry sits just below the reversal candle.

Don't enter before point D, because the CD leg may still be running. Every entry then needs a stop loss.

Where to Place a Stop Loss on an ABCD Pattern

Place a stop loss just beyond point D, because a move past that level suggests the setup has failed. A stop loss sits just below point D in a bullish ABCD pattern and just above point D in a bearish one.

Placing a stop loss beyond point D is common practice, and some traders use nearby market structure instead, such as a recent swing low. A stop loss limits risk, but a stop loss does not guarantee the exit price. Take profit targets then set where the trade may close.

Where to Set ABCD Pattern Take Profit Targets

Common ABCD pattern targets are the 38.2% and 61.8% retracements of the CD leg, then point C and point A.

1. Target 1 is the 38.2% retracement of the CD leg.
2. Target 2 is the 61.8% retracement of the CD leg.
3. Target 3 is point C.
4. Target 4 is point A.

Measure both retracements from point D back toward point C, so the CD leg is the base. Some sources measure from point A to point D, which gives different prices, so keep one base for the whole trade.

Traders may close part of a position at each take profit target.

ABCD Pattern Trading Example

A bullish ABCD pattern where the AB leg and the CD leg both measure 100 points makes a simple worked example. The prices are for illustration only, with no real instrument.

The worked example treats point D as an entry area, while trend followers treat point D as an exit area.

ABCD Pattern Trend Following and Day Trading

Trend followers use the ABCD pattern differently, entering when the BC retracement ends at point C and trading the CD leg with the trend. The name covers a reversal setup and a continuation setup, which is why advice on the ABCD pattern can clash.

A trend follower uses the same leg ratios to judge the BC retracement, then treats point D as an exit area. Day traders use the same shape on short charts, where an ABCD pattern can look like a bull flag, a sharp rise followed by a small drift lower.

Both uses rely on the same three legs, which also link the ABCD pattern to other harmonic patterns.

ABCD Pattern vs Other Harmonic Patterns

The ABCD pattern has four points, while the Gartley and Butterfly patterns add an X point and use five. Gartley and Butterfly patterns use X, A, B, C and D (XABCD), so point D is measured against the XA leg.

In a Gartley pattern, point D ends at 78.6% of the XA leg, so point D stays inside the XA leg.

In a Butterfly pattern, point D ends at 127% of the XA leg, so point D goes past point X.

Spotting the right pattern is only the first check, because common mistakes can still undo an ABCD pattern trade.

Common ABCD Pattern Mistakes

The most common ABCD pattern mistake is entering before point D completes.

• Entering before point D completes puts you in a trade while the CD leg may still be running against you.
• Forcing an ABCD pattern that is not there leads to trades on swings that miss the leg ratios.
• Treating point D as an automatic signal skips confirmation, and price can run straight through the PRZ.
• Expecting perfect symmetry makes you reject valid setups, because the AB leg and the CD leg are rarely exact.
• Ignoring the bigger trend raises the chance of a failed trade, because a strong trend can push price through the PRZ.

Avoiding each mistake helps, but the ABCD pattern still has limits of its own.

Advantages and Limitations of the ABCD Pattern

The ABCD pattern gives clear levels, but it can fail and works best alongside other analysis. No dependable win rate exists for the ABCD pattern.

The ABCD pattern has three main advantages.

• The simple shape of four points and three legs makes the ABCD pattern quick to learn.
• Clear levels give you a defined area for the entry, stop loss and take profit targets.
• Wide use across markets and timeframes means the same rules carry over from chart to chart.

The ABCD pattern also has three main limitations.

• Inexact legs leave room for judgement, because the AB leg and the CD leg rarely match perfectly.
• False signals happen, and price can move through the PRZ after a valid ABCD pattern.
• Low volume ranges weaken the ABCD pattern, which works best in trending markets.

FAQs

Is the ABCD Pattern a Reversal or Continuation Pattern?

The ABCD pattern can be used as both a reversal pattern and a continuation pattern. The harmonic form looks for a reversal at point D, while trend followers trade the CD leg with the trend.

What Does AB=CD Mean?

AB=CD means the CD leg tends to match the AB leg in length, and often in time. The two legs are rarely exact, so traders read the match as a guide.

Is Point D a Buy Signal?

No, point D is not a buy signal. Point D is an area where a turn may happen, so traders wait for confirmation in the PRZ.

Which Timeframe Works Best for the ABCD Pattern?

No single timeframe is best for the ABCD pattern, because it appears on all of them. Swing traders may use hourly or daily charts, and intraday traders may use 5 or 15 minute charts.

Can You Use the ABCD Pattern in Forex and Stocks?

Yes, the ABCD pattern can be used in forex and stocks. The ABCD pattern is a price pattern, so traders can apply it across markets, including forex, stocks, indices and commodities.

Is There an Indicator That Finds ABCD Patterns?

MT4 and MT5 help pages list no built in ABCD tool, but third party indicators exist, and TradingView has an ABCD drawing tool. Check any third party indicator carefully before you rely on it.