RSI and MACD

The RSI indicator and MACD are two of the most widely used momentum indicators. Traders use these forex indicators to describe trend direction and momentum strength, and to look for potential reversal points.

Understanding the RSI indicator

The Relative Strength Index (RSI) is an oscillator that measures the speed and magnitude of price changes on a scale from 0 to 100. Developed by J. Welles Wilder, the RSI indicator is typically set to a 14-period lookback. The key reference levels are:

• Above 70 — The market is considered overbought. Price has risen too quickly and may be due for a pullback or reversal.
• Below 30 — The market is considered oversold. Price has fallen too quickly and may be due for a bounce or reversal.
• 50 Level — Acts as a trend filter. RSI above 50 confirms bullish momentum; below 50 confirms bearish momentum.

RSI divergence

RSI divergence is one of the most discussed signals in technical analysis. It occurs when price and the RSI indicator move in opposite directions:

• Bullish Divergence — Price makes a lower low while RSI makes a higher low. This indicates weakening bearish momentum and a potential upward reversal.
• Bearish Divergence — Price makes a higher high while RSI makes a lower high. This warns that bullish momentum is fading and a downward reversal may be imminent.

Divergence signals are conventionally given more weight on higher timeframes (4-hour, daily) and when they occur at significant support or resistance levels. They also fail often: in a strong trend the RSI can stay overbought or oversold, and diverge from price, for a long time, and the evidence that divergence predicts reversals is weak and disputed.

Understanding the MACD

The MACD (Moving Average Convergence Divergence) consists of three components: the MACD line (difference between the 12 and 26 EMAs), the signal line (9-period EMA of the MACD line), and the MACD histogram (the difference between the MACD and signal lines). This indicator is designed to show changes in trend momentum.

MACD signal line crossovers

The most common MACD trading signal is the signal line crossover:

• Bullish Crossover — The MACD line crosses above the signal line. This signals upward momentum.
• Bearish Crossover — The MACD line crosses below the signal line. This signals downward momentum.
• Zero Line Crossover — When the MACD line crosses above or below zero, the 12-period average has crossed the 26-period average, which is read as a change in trend direction.

The MACD histogram

The MACD histogram provides a visual representation of the momentum behind a move. Growing histogram bars indicate increasing momentum, while shrinking bars suggest momentum is fading. When the histogram crosses from negative to positive, it confirms bullish momentum — and vice versa for bearish momentum.

Combining RSI and MACD

Look for trades where both momentum indicators agree: for example, an RSI bouncing from oversold territory while the MACD produces a bullish crossover is read by some traders as confirmation. Both indicators are calculated from the same past prices, so their agreement is not independent evidence, and neither says what price will do next.

Revised 4 October 2026. Statements that the indicators “identify” reversals, “excel” or are “most reliable” were reworded as what the indicators measure and how traders read them, and the lesson now says where their signals fail.