MACD (said "mack-dee") is a momentum indicator that measures whether a stock's short-term trend is pulling away from — or falling back toward — its longer-term trend. It turns two moving averages into a single line that swings above and below zero.
MACD has three pieces. The MACD line is one moving average minus another — traditionally the 12-day EMA minus the 26-day EMA. The signal line is a 9-day EMA of that MACD line. The histogram is the MACD line minus the signal line, drawn as bars. Example (illustrative): if the 12-day EMA is $102 and the 26-day EMA is $100, the MACD line reads +2 — recent momentum is upward. When the 12-day slips below the 26-day, MACD drops below zero.
A crossover is when the MACD line crosses its signal line — upward reads as strengthening momentum, downward as weakening. A divergence is when price makes a new high but MACD does not, hinting the move is running out of fuel. Both are widely watched, which is exactly why they carry little edge on their own.
Quantustik does not base its forecasts on textbook indicators like MACD — a signal everyone can pull up for free is already priced in. Our forecasts come from a quantum-mechanics-based model with calibrated confidence bands. We may show MACD for context, never as the basis of a recommendation. None of this is investment advice.
They are the default look-back windows: the MACD line is the 12-day EMA minus the 26-day EMA, and the signal line is a 9-day EMA of that MACD line. They are conventions, not magic numbers.
It's when the MACD line crosses its signal line — upward reads as strengthening momentum, downward as weakening. Because everyone watches it, a crossover alone carries little predictive edge.
Neither is "better" — they measure different things, and both are lagging, widely-known indicators whose plain readings are already priced in.
Browse all S&P 500 tickers to see this metric applied to individual companies.
Educational research only — not investment advice.