Understanding Momentum and MACD Indicators in Trading

Understanding Momentum

Momentum measures how quickly prices are rising or how steeply a trend line is sloping. It functions similarly to acceleration and deceleration. Momentum indicators act as leading signal generators or confirmation tools, indicating whether the trend slope is changing.

• Confirmation: Occurs when momentum aligns with the price trend.
• Divergence: Occurs when momentum fails to confirm the price trend, providing a warning signal.

Confirmation is also used to identify overbought and oversold conditions as prices oscillate around a central trend:

• Overbought: Prices are noticeably above the central trend.
• Oversold: Prices are considerably below the trend and are likely to return toward or above the central trend.

The Moving Average Convergence Divergence (MACD)

The MACD is calculated using the difference between two exponential moving averages (EMA). Traditionally, a 26-period EMA is subtracted from a 12-period EMA, though these timeframes are adjustable.

How MACD Works

The MACD fluctuates above and below the zero line:

• Positive MACD: Indicates the 12-period average exceeds the 26-period average, suggesting increasing upside momentum.
• Negative MACD: Indicates the 12-period average is below the 26-period average.

The MACD is plotted at the bottom of a price chart alongside a signal line, which is typically a 9-period EMA of the MACD. A histogram representing the difference between the MACD and the signal line is often displayed as well.

Interpreting MACD Signals

• Bullish Crossover: The MACD turns up and crosses above the signal line.
• Bearish Crossover: The MACD turns down and crosses below the signal line.
• Bullish Divergence: A security records a lower low while the MACD forms a higher low.
• Bearish Divergence: A security records a higher high while the MACD line forms a lower high.

Note: Divergences should always be interpreted with caution.