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MACD, signal line and histogram
నవీకరణ 4 ఆగస్టు 2026 · 3 నిమిషాల చదువు · 14 విషయ సూచిక
సరళమైన అర్థం
Moving Average Convergence Divergence compares a fast EMA with a slow EMA, smooths their difference into a signal line and plots the remaining difference as a histogram. It measures relationships within a selected price series, not convergence between two securities.
Learning objectives #
You should be able to distinguish MACD line, signal and histogram, explain XMarketRadar's SMA-seeded EMA stages, and separate zero-line state from signal-line crossover events.
Core concept #
MACD=fast EMA−slow EMA. Signal is an EMA of MACD, and histogram=MACD−signal. Standard settings are often 12, 26 and 9 but must be displayed rather than assumed. Every EMA stage in XMarketRadar uses its own SMA seed and restarts after an interior unavailable value.
Method and conventions #
Record all three periods and selected input. Define whether a rule concerns MACD versus zero, MACD versus signal, histogram sign or a fresh crossing. These related conditions should not be counted as four independent confirmations.
Use it in XMarketRadar #
Add MACD below the chart, inspect legend settings and ensure sufficient warm-up beyond the slow period plus signal seed. In Screener, use explicit state or crossover semantics and open the chart for the underlying completed bars.
Worked example #
If fast EMA is 104 and slow EMA 101, MACD is +3. If signal is +2.2, histogram is +0.8. The fast average is above the slow and MACD is above its signal, but the numbers do not specify tomorrow's price change.
How to interpret it #
Positive MACD describes fast EMA above slow EMA. Positive histogram describes MACD above signal. Histogram shrinking while positive means that difference narrowed; it is not yet a negative histogram or necessarily a price reversal.
Limitations and common mistakes #
Common errors are reading histogram height as return, treating every positive bar as a new crossover, comparing implementations with different EMA seeds and calling price/indicator divergence without declared pivots.
Market-specific differences #
The settings count bars, so standard daily parameters and standard hourly parameters represent different durations. Market closure gaps and thin trading influence EMA responsiveness.
Key takeaway #
Key takeaway: MACD contains three related series; interpretation must name the exact comparison and distinguish state from transition.
Practice exercise #
Practice: compute MACD and histogram from supplied EMA values, then label zero-line state, signal-line state and whether a fresh crossover actually occurred.
Educational use only #
This chapter is descriptive education. It is not investment advice, a price prediction, a recommendation, a claim of predictive accuracy, or an instruction to buy, sell, rebalance or place an order.