Momentum Indicators: Meaning, Types and How to Read Them

A share can continue to rise even if the buying interest supporting it is beginning to weaken, and it might also drop sharply for a period of time before the selling pressure starts to decrease. That is why momentum indicators can be useful.

These technical analysis tools examine the speed and intensity of price movements over a period, and traders use them to better understand whether a trend has enough momentum to continue or may be losing it.

The Relative Strength Index (RSI), Moving Average Convergence Divergence (MACD), Stochastic Oscillator, and Rate of Change (ROC) are among the most used momentum indicators. Although they work slightly differently, the general concept is the same: to understand what's happening beneath price movements.

Key Takeaways

• Momentum indicators, instead of just indicating whether a stock is rising or falling, measure the speed or intensity of a price change.
• A momentum reading must not be looked at by itself since price action, volume, and the overall trend can offer important context.
• A difference between price and an indicator at times indicates that a trend is losing strength.
• Since momentum indicators are based on historical price data, they cannot definitely predict future movements.
• A momentum indicator combined with an analysis based on trend or volume can give a more balanced perspective.

What Counts as a Momentum Indicator?

A momentum indicator is a tool used in technical analysis for measuring the rate at which the price of an asset is changing over a specific period.

Here's a way of looking at it: While it's useful to know that a stock has gone up, it's more informative to know how fast it has risen since a slow increase and a sudden rally can indicate quite different market conditions.

Momentum indicators aim to capture that difference.

Certain indicators fluctuate between set figures, for example, 0 and 100, whereas others fluctuate around a central or zero line.

Traders look for indications at these levels that buying or selling pressure might be becoming exceptionally strong.

For example, an RSI value higher than 70 is usually regarded as indicating that the stock is overbought, while a reading below 30 is generally seen as showing that it is oversold.

Yet these levels do not automatically imply that the stock will go down or up; it is possible for a stock to stay overbought for a long period during a strong upward trend.

This is why the indicator should be read in conjunction with the price chart and not be regarded as a separate signal.

How is Momentum Calculated?

The easiest method of calculating momentum is to compare the current closing price with the closing price from a previous period.

Formula:

Momentum = (Current Closing Price ÷ Closing Price N Periods Ago) × 100

Here:

• The current closing price is the price at which the stock most recently closed.
• The closing price N periods ago is the closing price that was recorded during the previously selected number of days or weeks.
• N is the lookback period that is selected for the calculation.

For instance, imagine that 14 days ago a stock was at ₹220 and is now quoted at ₹250.

Momentum = (250 ÷ 220) × 100

Momentum = 113.6

If the reading is above 100, then the present price is higher than it was during the comparison period; if it is below 100, then the price is lower.

It is important to remember that various momentum indicators employ different methods of calculation.

This means that while this formula illustrates the basic concept of price momentum, it should not be treated as the universal formula for all momentum indicators.

What are the Various Kinds of Momentum Indicators?

There isn't a single momentum indicator that is best in all situations, and traders usually select one according to their own trading style, the timeframe in question, and the kind of signal they wish to study.

Here are some of the more widely used ones:

1. Relative Strength Index (RSI)

   The RSI is a scale ranging from 0 to 100 that indicates the strength of recent price movements. Readings above 70 are usually regarded as signifying that the asset is overbought, and those below 30 are generally seen as indicating that it is oversold.

   In addition to these levels, traders also take into account the direction of the RSI and whether it is moving in keeping with the price of the stock.

2. Moving Average Convergence Divergence (MACD)

   The MACD involves the comparison of two exponential moving averages, typically the 12-day and the 26-day EMAs, and also has a 9-day signal line.

   Traders usually look for the MACD line crossing the signal line. A movement above the signal line could indicate improving momentum, whereas a movement below it might suggest weakening momentum.

3. Stochastic Oscillator

   The Stochastic Oscillator compares the closing price of a stock with the range of its recent trades and varies between 0 and 100.

   Levels above 80 are usually regarded as overbought, and those below 20 are seen as oversold. Traders may also look out for crossovers and divergences.

4. Williams %R

   Williams %R is also a momentum oscillator which compares the most recent closing price with the recent trading range, and its scale extends from 0 to -100.

   It is frequently employed in order to detect situations where assets may be overbought or oversold, especially when one is examining short-term price movements.

5. Rate of Change (ROC)

   ROC measures the percentage change in price over a specific period. It can help traders identify whether the pace of a price move is increasing or slowing down.

6. Commodity Channel Index (CCI)

   CCI compares the current price with its average price over a particular period. It can be used to identify unusually strong upward or downward price movements.

   Conditions of overbought and oversold situations are often observed when the values are above +100 or below -100, although the interpretation may differ according to the market.

How can one Read a Momentum Indicator?

When you first look at a momentum indicator, it can be rather confusing, particularly since the price chart and the indicator seem to be giving conflicting accounts. There are a few simple points which can make it easier to interpret.

Look at the Centreline

A number of momentum indicators have a central level which is used to distinguish between relative strength and weakness, this level being 50, 0, or some other reference point depending on the indicator.

For example, traders frequently use the 50 level of the RSI as an approximate sign of whether the momentum is relatively strong or weak.

Watch Overbought and Oversold Levels

Extreme readings indicate that a stock has undergone a significant movement in one direction over a relatively short period. That does not mean a stock will fall just because it is overbought. Nor does it mean that a rebound will certainly take place simply because it is oversold.

There is a clear trend in which an indicator remains at an extreme level for longer than usual.

Pay Attention to the Slope

The indicator's direction may prove to be useful.

The fact that a stock is still going up but its momentum indicator has begun to fall might show that the speed of the rally is decreasing. Conversely, a rising momentum indicator could mean that the buying strength is increasing.

Look for Divergence

1. Regular Divergence (Reversal Signal)

   Signals a potential trend reversal when price and momentum move in opposite directions near major highs or lows.

   Bearish Regular Divergence: Price makes a higher high, but the RSI/momentum indicator makes a lower high. Indicates weakening buying momentum and warns of a potential downward reversal.

   Bullish Regular Divergence: Price makes a lower low, but the momentum indicator makes a higher low. Indicates weakening selling pressure and warns of a potential upward reversal.

2. Hidden Divergence (Trend Continuation Signal)

   Signals that the ongoing trend is likely to continue after a brief pullback or consolidation.

   Bearish Hidden Divergence: Price makes a lower high, but the momentum indicator makes a higher high. Occurs during a downtrend, signaling that downward momentum is resuming.

   Bullish Hidden Divergence: Price makes a higher low, but the momentum indicator makes a lower low. Occurs during an uptrend, signaling that upward momentum is resuming.

Momentum Indicators vs Trend Indicators

Although momentum and trend indicators are connected, they deal with different questions.

Factor	Momentum Indicators	Trend Indicators
What they measure	Speed and strength of price movement	Direction and overall trend
Examples	RSI, MACD, Stochastic, ROC	Moving averages, trendlines, ADX
Common use	Identifying momentum shifts and possible entry or exit points	Understanding the broader market direction
Typical signals	Overbought, oversold and divergence	Uptrend, downtrend or sideways movement
Reaction	Often reacts relatively quickly to price changes	Usually provides a smoother, slower view