What does MACD tell you about a stock?

MACD (Moving Average Convergence Divergence) is a trend-following momentum indicator that shows the relationship between two exponential moving averages of a stock's price. It consists of the MACD line (the 12-period EMA minus the 26-period EMA), the signal line (a 9-period EMA of the MACD line), and the histogram (the gap between MACD and signal line). When the MACD line crosses above the signal line, it generates a bullish signal. When it crosses below, it generates a bearish signal.

How do you read a MACD signal?

A MACD crossover happens when the MACD line crosses the signal line. A bullish crossover (MACD crosses above the signal line) suggests that momentum is shifting upward and is typically treated as a buy signal. A bearish crossover (MACD crosses below the signal line) suggests downward momentum and is treated as a sell or short signal. Crossovers that happen well below or above the zero line are generally considered more significant than those near zero.

What is a MACD crossover and is it bullish?

MACD divergence occurs when the price of a stock and the MACD indicator move in opposite directions. Bullish divergence: price makes a new low but MACD makes a higher low — suggesting selling pressure is weakening and a reversal may be coming. Bearish divergence: price makes a new high but MACD makes a lower high — suggesting buying pressure is fading and the uptrend may be losing steam. Divergences are among the most reliable signals MACD produces, but they require patience — they can take weeks to play out.

What does the MACD histogram mean?

The MACD histogram shows the gap between the MACD line and the signal line. Growing bars mean momentum is accelerating. Shrinking bars mean momentum is fading — often the earliest warning of a trend change before the crossover occurs. When the histogram flips from negative to positive, the bullish crossover has occurred.

Is MACD a good indicator for day trading?

MACD was designed for daily charts and works best for swing trading (2–10 day holds). For day trading on short timeframes (5-minute, 15-minute), MACD generates many false crossovers due to noise. Day traders who use MACD typically use faster settings (5-13-5) and combine it with RSI and volume confirmation to filter out noise.

QUICK ANSWER

MACD (Moving Average Convergence Divergence) measures momentum by subtracting the 26-day EMA from the 12-day EMA. When the MACD line crosses above the signal line (9-day EMA of MACD), it's a buy signal — momentum is turning upward. The histogram shows the gap between the two lines; when it flips from negative to positive, the crossover has occurred. APEX weights MACD at 22% of its composite score — the highest-weighted single signal.

BLOG · TECHNICAL INDICATORS

What Is MACD? The Trend Indicator Every Trader Should Understand

MACD is one of those indicators that looks intimidating on first glance — three lines, a histogram, numbers you didn't ask for. But the core idea is simple: it's just two moving averages and the gap between them. When they converge, the trend is weakening. When they diverge, momentum is building.

What Is MACD?

MACD stands for Moving Average Convergence Divergence. It measures the relationship between a 12-period exponential moving average (EMA) and a 26-period EMA. The formula: MACD Line = EMA(12) − EMA(26).

When the shorter-term average (12) rises above the longer-term average (26), MACD is positive — shorter-term momentum is stronger. When it falls below, MACD is negative. The signal line is a 9-period EMA of the MACD line itself, smoothing it out. The histogram shows the gap between MACD and signal line — growing bars mean momentum is building; shrinking bars mean it's fading.

THE THREE COMPONENTS

MACD Line

EMA(12) − EMA(26)

The core signal. Positive = short-term momentum above long-term. Negative = below. Where it sits relative to zero matters.

Signal Line

EMA(9) of MACD Line

A smoothed version of the MACD line. Crossovers between MACD and Signal generate buy/sell signals.

Histogram

MACD Line − Signal Line

Shows the gap between MACD and Signal. Growing bars = accelerating momentum. Shrinking bars = decelerating — often a warning before a crossover.

How to Read a MACD Crossover

The crossover is the most watched signal. When the MACD line crosses above the signal line, it suggests upward momentum is picking up — bullish. When MACD crosses below signal, downward momentum is taking over — bearish.

Crossovers that happen far from the zero line carry more weight. A bullish crossover that happens when MACD is deep in negative territory (well below zero) means momentum is shifting from sharply negative to recovering — that's a significant reversal signal. A crossover right at zero is less meaningful.

The weakness with crossovers: in choppy markets, they generate lots of false signals. The MACD line and signal line crisscross repeatedly without any real trend developing. This is why MACD works best on trending stocks — it's a trend-following indicator that struggles in range-bound conditions.

MACD Divergence: The Signal Most Traders Miss

Divergence is arguably MACD's most powerful signal — and the least used by beginners. Bearish divergence: the stock makes a new 52-week high, but MACD fails to make a new high. The price is going up but the momentum behind it is weakening. That's a warning sign. Not a sell signal today, but a signal to tighten stops and size down.

Bullish divergence: the stock makes a new low, but MACD makes a higher low. Sellers are losing control even as price drops. This often appears near the end of a correction and can precede powerful reversals when paired with other bullish signals.

MACD and RSI: Better Together

MACD tells you about trend direction and momentum. RSI tells you about whether a stock is overbought or oversold. They complement each other. A bullish MACD crossover with RSI at 45 (room to run) is a much cleaner setup than the same crossover with RSI at 78 (already stretched). Combining the two filters out many false signals and produces higher-confidence entries.

APEX runs both together and scores them as a combined MACD+RSI signal — one of the most reliable setups in the engine.

See MACD Scored on Any Stock in Real Time

APEX calculates MACD, divergence detection, and signal line crossovers with a combined verdict in seconds.

MACD Deep Dive →

Frequently Asked Questions

What is MACD?

MACD (Moving Average Convergence Divergence) measures the gap between a 12-period and 26-period exponential moving average. It shows trend direction, momentum, and potential reversal points.

What is a MACD crossover signal?

When the MACD line crosses above the signal line, it's bullish. When it crosses below, it's bearish. Crossovers far from the zero line carry more weight than those near zero.

What is MACD divergence?

When price and MACD move in opposite directions. Bearish divergence (new price high, lower MACD high) suggests weakening momentum. Bullish divergence (new price low, higher MACD low) suggests a potential reversal.

What are the standard MACD settings?

12, 26, 9 — these are the default settings used by virtually all traders and are a strong starting point. Changing them makes your signals harder to compare with the broader market.