Is it dangerous for the MACD column to shorten continuously but the price reaches a new high?

A shrinking MACD histogram at a new price high signals weakening momentum and potential bearish divergence, warning traders of a possible reversal.

Jul 30, 2025 at 02:08 am

Understanding the MACD Indicator and Its Components

The MACD (Moving Average Convergence Divergence) is a widely used momentum oscillator in technical analysis that helps traders identify trend direction, momentum, and potential reversal points. It consists of three primary components: the MACD line, the signal line, and the MACD histogram (often referred to as the "column"). The MACD line is calculated by subtracting the 26-period Exponential Moving Average (EMA) from the 12-period EMA. The signal line is a 9-period EMA of the MACD line. The histogram represents the difference between the MACD line and the signal line, visualized as vertical bars above or below the zero line.

When the MACD histogram bars shorten, it indicates that the momentum behind the current price move is decreasing. Even if the price continues to rise and makes a new high, a shrinking histogram suggests that the rate of upward acceleration is slowing. This phenomenon is often interpreted as a sign of weakening bullish momentum and may signal an impending reversal or correction.

What Does a Shrinking MACD Histogram Mean?

A continuously shortening MACD column reflects that the gap between the MACD line and the signal line is narrowing. This narrowing occurs when the shorter-term EMA (12-period) is no longer accelerating away from the longer-term EMA (26-period). In a healthy uptrend, you would expect the histogram bars to either remain steady or expand as new highs are made, indicating strong and consistent momentum.

However, when the price reaches a new high while the MACD histogram shrinks, it creates a bearish divergence. This means that price action and momentum are no longer in alignment. The market may be overbought, and buyers are losing strength. The divergence does not guarantee an immediate reversal, but it does raise a caution flag for traders relying on momentum-based strategies.

Identifying Bearish Divergence Step by Step

To detect this scenario on a chart, follow these steps:

• Open your preferred trading platform (e.g., TradingView, MetaTrader) and apply the MACD indicator to the price chart of the cryptocurrency you're analyzing.
• Ensure the default settings are used: 12, 26, 9, unless you have a tested alternative configuration.
• Observe recent price action and locate the most recent swing high in price.
• Check the corresponding MACD histogram at that price peak and compare it to the previous swing high’s histogram height.
• If the current price high is higher than the previous high, but the MACD column is shorter, you have identified a bearish divergence.
• Confirm the divergence by ensuring both swing points are clear and not part of choppy or sideways movement.

This divergence becomes more significant when it occurs after a prolonged uptrend and is supported by other technical signals such as overbought conditions on the RSI or resistance at key Fibonacci levels.

Risks and Implications for Cryptocurrency Traders

In the volatile world of cryptocurrency trading, bearish divergence between price and MACD can be especially dangerous if ignored. Cryptocurrencies like Bitcoin or Ethereum often experience rapid price surges fueled by speculation. When momentum begins to fade—indicated by a shrinking MACD histogram—early signs of exhaustion appear.

Traders holding long positions may face increased risk of sudden pullbacks or sharp corrections. For example, during a rally in Solana (SOL), if the price hits a new all-time high but the MACD histogram shows diminishing bars, it could precede a 20%–30% drop within days. This is particularly true if the divergence coincides with high trading volume on down bars or negative news in the crypto space.

Moreover, automated trading bots and algorithmic systems often detect such divergences and may initiate sell-offs, accelerating downward pressure. Retail traders who fail to recognize this signal might find themselves exiting positions at much lower prices.

How to Respond to This Signal

When you observe a shortening MACD histogram alongside a new price high, consider the following actions:

• Reduce position size on long entries or take partial profits if already in a trade.
• Set tighter stop-loss orders below recent swing lows to protect capital.
• Look for confirmation from other indicators such as RSI divergence, volume decline on up-moves, or rejection at key resistance levels.
• Avoid opening new long positions until the MACD histogram shows renewed expansion in the same direction as price.
• Monitor for a bearish crossover, where the MACD line crosses below the signal line, which may confirm weakening momentum.

It is also helpful to analyze higher timeframes (e.g., daily or 4-hour charts) to determine whether the divergence is part of a larger trend or just noise on lower timeframes.

Common Misinterpretations and Pitfalls

Many traders misinterpret a shrinking MACD histogram as an immediate sell signal. However, momentum oscillators can remain in divergence for extended periods during strong trends. For instance, during the 2021 bull run, Bitcoin showed multiple bearish divergences on weekly charts that did not result in reversals for months.

Another pitfall is ignoring the context of the market. In a strong bullish cycle, short-term divergences may only lead to minor pullbacks rather than trend reversals. Additionally, using MACD on low-volume altcoins can produce false signals due to erratic price swings and low liquidity.

Traders should avoid acting on MACD divergence alone. Combining it with support/resistance analysis, candlestick patterns, and on-chain data (such as exchange outflows or whale movements) increases the reliability of the signal.

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Frequently Asked Questions

Can a shortening MACD histogram occur in a downtrend?

Yes. In a downtrend, if the price makes a new low but the MACD histogram bars are less negative (shorter), it indicates bullish divergence—a potential sign of weakening selling pressure and a possible upward reversal.

Does the MACD histogram turning negative mean a reversal is imminent?

Not necessarily. The histogram turning negative means the MACD line has crossed below the signal line, which is a bearish signal. However, in a strong uptrend, this can be a temporary pause. The key is whether the histogram continues to shorten or begins to expand downward.

How can I adjust MACD settings for better accuracy in crypto trading?

Some traders use faster settings like 8, 17, 9 to make MACD more responsive to crypto’s volatility. However, this increases false signals. Always backtest any changes on historical data before using them in live trading.

Is MACD divergence more reliable on certain timeframes?

Yes. Divergences on higher timeframes (e.g., daily or weekly) are generally more reliable than those on 5-minute or 15-minute charts. Shorter timeframes are more prone to noise and whipsaws, especially in low-cap cryptocurrencies.