How to Use the RSI Indicator and MACD With Moving Averages

01What momentum indicators actually measure

Technical indicators are formulas applied to price history. Momentum tools such as the RSI indicator and MACD try to answer one question: is the current move speeding up or slowing down? They do not know about news, order flow or fundamentals; they only rearrange the closes you can already see on the chart.

Used well, they add structure to your reading of a candlestick chart. Used badly, they produce a stream of buy and sell signals that contradict each other. The aim of this guide is to explain each tool clearly enough that you know when its signal carries weight and when it does not.

02The RSI indicator: formula in plain words

The Relative Strength Index, developed by J. Welles Wilder, compares the size of recent up-closes with recent down-closes over a set number of periods, 14 by default.

1. For each period, note how much price rose (if it closed higher) or fell (if it closed lower).
2. Average the gains and the losses separately over the lookback period, using a smoothed average.
3. Divide the average gain by the average loss to get the relative strength (RS).
4. Convert it to a 0–100 scale: RSI = 100 minus 100 divided by (1 + RS).

If gains have dominated, the RSI indicator rises towards 100; if losses dominate, it falls towards 0. A reading of 50 means gains and losses have been roughly balanced.

How traders read RSI

• Overbought and oversold: readings above 70 are labelled overbought and below 30 oversold. In strong trends RSI can stay in these zones for a long time, so they describe stretched momentum rather than an automatic reversal.
• The 50 line: in an uptrend, RSI often holds above 40–50 on pullbacks; in a downtrend it often fails below 50–60.
• Settings: shorter lookbacks (such as 9) react faster but produce more false signals; longer ones (such as 21) are smoother but slower.

03The MACD indicator: formula in plain words

MACD, short for Moving Average Convergence Divergence and created by Gerald Appel, is built from exponential moving averages (EMAs), which give more weight to recent prices.

• MACD line: the 12-period EMA minus the 26-period EMA.
• Signal line: a 9-period EMA of the MACD line.
• Histogram: the MACD line minus the signal line, drawn as bars.

When the faster EMA is above the slower one, MACD is positive, meaning short-term momentum is stronger than longer-term momentum. When the histogram shrinks, the gap between the lines is narrowing and momentum is slowing.

Common MACD signals

• Signal-line crossover: MACD crossing above its signal line is read as bullish momentum; crossing below as bearish.
• Zero-line cross: MACD moving above or below zero confirms the shorter EMA crossing the longer one, a slower trend signal.
• Histogram turns: bars getting shorter can warn of a weakening move before the lines actually cross.

04Moving averages: the trend filter

A simple moving average (SMA) is the average close over a set number of periods; an exponential moving average weights recent closes more heavily. Traders use them to define trend direction and to filter momentum signals.

A simple filter many traders use: take only bullish RSI indicator or MACD signals when price is above a chosen moving average, and only bearish ones when it is below. This removes many counter-trend signals, though it also means missing some early reversals.

05Divergence: when price and momentum disagree

Bearish divergence happens when price makes a higher high but RSI or MACD makes a lower high: the new high was reached with less momentum. Bullish divergence is the reverse: price makes a lower low while the indicator makes a higher low.

Hypothetical example: gold rises to a peak, pulls back, then pushes to a slightly higher peak. On the first peak RSI read 76; on the second, only 64. The divergence suggests buyers are less forceful. A cautious trader would not sell on that alone, but might tighten the stop on an existing long position or wait for a bearish candle at a resistance level before considering a short. These numbers are purely illustrative.

Divergence can persist through several further highs before price turns, which is why it works better as a warning than as an entry trigger.

06Combining indicators with price action

Indicators are most useful when they confirm something price is already showing. A practical sequence looks like this:

1. Trend: use a moving average or the higher-timeframe structure to decide whether you favour buys or sells.
2. Location: wait for price to reach a level you marked in advance.
3. Trigger: look for a candlestick signal at that level.
4. Confirmation: check that the RSI indicator or MACD agrees, for example RSI turning up from near 40 in an uptrend.
5. Risk: set the stop beyond the level and size the position to your risk rule, as explained in our trading risk management guide.

Avoid stacking several similar indicators, such as RSI, Stochastic and CCI together. They are all built from the same closes and tend to say the same thing, which creates false confidence rather than extra information.

07Limits of RSI and MACD

• Lag: both are calculated from past prices, so signals arrive after the move has started.
• Whipsaws: in sideways markets, MACD crossovers flip back and forth repeatedly.
• News shocks: releases such as US payrolls can overwhelm any technical reading; check the economic calendar before relying on a setup.
• Curve fitting: tweaking settings until they fit past data rarely improves future results.

Indicators help you organise decisions; they do not reduce the underlying risk of leveraged trading. CFDs are complex instruments that can produce rapid losses, potentially larger than expected, so only trade money you can afford to lose, and note that product availability depends on your region. QTFX Markets provides candlestick and line charts across multiple timeframes for following price, and a demo account is the right place to test any indicator rule before real money is involved.