What Is MACD?
MACD was developed by Gerald Appel in the late 1970s. It consists of three components:
- MACD Line: The difference between the 12-day and 26-day exponential moving averages (EMAs). When the 12-day EMA is above the 26-day EMA, MACD is positive — short-term momentum is stronger than long-term. When below, momentum is weakening.
- Signal Line: A 9-day EMA of the MACD line itself. Smoother and slower than the MACD line.
- Histogram: The difference between the MACD line and the signal line. When the histogram is growing, momentum is accelerating. When it's shrinking, momentum is fading — often the earliest warning of a trend change.
The Key Signal: MACD Crossover
Bullish Crossover BUY SIGNAL
When the MACD line crosses above the signal line, it indicates that short-term momentum is accelerating relative to the longer trend — a bullish signal. For cyclical stocks, a bullish MACD crossover that occurs after an extended downtrend (at low absolute MACD levels) is particularly significant — it suggests the selling momentum is genuinely exhausted and buyers are returning.
Bearish Crossover SELL SIGNAL
When the MACD line crosses below the signal line, short-term momentum is weakening. For cyclical stocks near cycle peaks, a bearish crossover at high absolute MACD levels has historically been one of the most reliable sell signals — particularly when accompanied by other indicators like RSI divergence or P/B at elevated levels.
Zero Line Crossovers
When the MACD line crosses above zero, the 12-day EMA has crossed above the 26-day EMA — equivalent to a shorter-period golden cross. This is a stronger, more confirmed bullish signal than a signal-line crossover, but also more lagged.
For cyclical investors with a multi-month or multi-year time horizon, zero-line crossovers are more relevant than signal-line crossovers — they confirm that the underlying trend has genuinely shifted, not just that momentum has briefly ticked up.
MACD Histogram — The Early Warning System
The histogram is the most forward-looking component of MACD. When the histogram bars are growing in size (even if still negative), it means selling momentum is fading — often 2–4 weeks before the actual MACD crossover occurs. Watching the histogram for signs of momentum exhaustion can help identify cycle turns earlier than the crossover itself.
In practice: if a cyclical stock has been falling for months and the MACD histogram starts to produce smaller negative bars (diverging from price), this is an early warning that the selling trend is losing steam — worth watching closely alongside fundamental indicators.
Applying MACD to Cyclical Stocks: A Practical Example
Equinor (EQNR) provides a clear example of MACD at a cycle turn. In the spring of 2020, as oil fell to historic lows and EQNR hit NOK 120:
- MACD histogram began producing smaller negative bars in April 2020 — first warning
- MACD signal-line bullish crossover occurred in May 2020 — initial buy signal
- MACD zero-line crossover confirmed in July 2020 — trend confirmation
- EQNR peaked at NOK 390 in June 2022 — 225% above the 2020 low
Each MACD signal came slightly later and with slightly less return potential — but with significantly more confidence that the turn was genuine.
MACD vs RSI: Which to Use?
| Indicator | Best for | Main weakness |
|---|---|---|
| MACD | Trend momentum, crossover timing | Lags; false signals in choppy markets |
| RSI | Overbought/oversold extremes | Can stay extreme for extended periods |
| 200 DMA | Confirming long-term trend direction | Very lagged; slow to signal turns |
The answer, for cyclical investing, is to use all three together — with each indicator providing a different dimension of confirmation. Signycle's technical scoring model weights all three, with the combined score triggering alerts only when multiple indicators align.
Fundamentals + technicals in one signal.
Signycle combines cycle indicators with technical confirmation — and alerts you when both agree it's time to act.