Founder, Underpitch · Educational material on market structure, chart reading and risk awareness.
3 July 2026
MACD measures the relationship between two exponential moving averages. The MACD line, signal line and histogram help describe trend and momentum changes. Because it is derived from averages, it lags and performs poorly when price is directionless.
Key points
- A crossover is more meaningful with price structure.
- The zero line separates positive and negative average spread.
- Histogram contraction shows changing momentum.
- MACD is not an overbought/oversold oscillator.
Components
The standard MACD line is the 12-period EMA minus the 26-period EMA. A 9-period EMA of that line is the signal line; the histogram shows their difference.
Crossovers
A bullish crossover occurs when MACD crosses above the signal line. Quality improves when it follows a pullback in an established trend.
Zero-line analysis
Crossing above zero means the shorter EMA has moved above the longer EMA. A zero-line retest can help frame trend continuation.
Histogram and divergence
A shrinking histogram shows momentum is decelerating. Divergence can warn of weakness but still needs price confirmation.
Worked Indian-market example
During an uptrend, MACD pulls toward zero while price holds above support. A bullish crossover after a higher low provides more context than a crossover in the middle of a sideways range.
Quick reference
| Concept | What it shows | Practical meaning |
|---|---|---|
| MACD line | Fast EMA minus slow EMA | Trend-momentum relationship |
| Signal line | EMA of MACD line | Crossover reference |
| Histogram | MACD minus signal | Momentum acceleration/deceleration |
| Zero line | Equal fast and slow EMA | Broad trend reference |
Risks and limitations
- Signals lag sudden reversals.
- Sideways markets create repeated crossovers.
- Changing settings can overfit.
- Divergence alone is not an entry rule.
Frequently asked questions
Is MACD better than RSI?
They answer different questions: MACD is trend-momentum; RSI is bounded momentum.
What are standard settings?
12, 26 and 9 are common defaults.
Can MACD show overbought?
Not in a fixed 0–100 sense.
Should I buy every bullish crossover?
No. Use trend, level, volume and risk context.
Sources and methodology
Technical analysis is a market-study framework, not a promise of returns. Verify exchange rules, contract specifications and risk disclosures from official sources before acting.
This page is for education and chart-reading awareness. It is not a personalised investment, trading, legal or tax recommendation. Technical setups can fail and market losses can exceed the planned amount because of gaps, leverage, liquidity and execution.