What the momentum indicator measures
The momentum indicator compares today's closing price with the closing price N periods ago. A period is one bar on your chart, such as an hour or a day. It does not show where price will go. It shows how fast price has moved over a fixed window.
- When the line rises, the latest close is further above the old close than before. The move is speeding up.
- When the line falls, the move is slowing down or reversing.
- The centre line means no change: the current close equals the close N periods back.
Momentum is an oscillator, meaning a line that moves around a centre level in a separate window under the price chart. It belongs to the same family as the RSI and Rate of Change.
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Formula and default settings
There are two common versions:
- Difference: Momentum = Close − Close N periods ago
- Ratio (used in MetaTrader): the current close divided by the close N periods ago, scaled so that the centre line marks no change
Both versions follow the same shape. Only the scale differs. You can check the default period in the indicator's settings window. Most traders leave it at the default at first and change it only after testing.
Momentum indicator settings to know:
| Setting | Effect |
|---|---|
| Shorter period | Reacts faster, gives more noise and more false swings |
| Longer period | Smoother, reacts later |
| Apply to | Close is standard. Other prices (open, median, typical) change the reading slightly |
How to add it in MT4 and MT5
In both MetaTrader 4 and MetaTrader 5:
- Open the chart.
- Go to Insert → Indicators → Oscillators → Momentum. You can also drag it from the Navigator window.
- Set the period and the price type, then confirm.
You can practise reading it on a demo account before using it with real money.
How to read it: a drawn example
The sketch below is an illustration, not real prices:
Price makes a new high, but momentum peaks lower. The advance continues, but each push covers less distance than the one before. This mismatch is called divergence. It describes a slowing move. It is not an instruction to buy or sell.
Typical uses
- Trend strength: a line that stays on one side of the centre line during a trend shows the move is still pushing in that direction.
- Centre-line crosses: a cross shows the current close has moved past the old close. It is used as context, not as a trigger on its own.
- Divergence: a mismatch between price highs or lows and momentum highs or lows.
- Filter: some traders check momentum alongside trend tools such as the ADX or moving averages.
Where momentum misleads
- Ranges: in a sideways market the line crosses the centre line again and again, giving noise.
- No fixed bounds: unlike the RSI, momentum has no fixed upper or lower limit. "Extreme" readings depend on the instrument and its volatility, so overbought and oversold levels are not universal.
- Base-period effect: the reading depends on the old close as well as the new one. A sharp bar dropping out of the window can move the line even when current price barely changes.
- Gaps and news spikes: a single large bar distorts the line until it leaves the window.
- Divergence can persist: a strong trend can show divergence for a long time while price keeps going.
- Lag: it is built from past closes, so it is a lagging tool, even though it reacts sooner than a moving average.
For experienced traders: compare momentum across timeframes rather than reading it on one chart alone. Normalise expectations by volatility, for example with the ATR. Remember that the ratio version makes readings comparable across price levels, while the difference version does not.
Leveraged forex and CFD trading can lose money fast, and no indicator removes that risk. See risk management and the wider technical analysis section.
Frequent questions
Is momentum the same as Rate of Change?
They are closely related. Both compare the current close with an older close. They differ in how the result is scaled.
What are the best momentum indicator settings?
No setting suits every market. Shorter periods react faster with more noise, and longer periods are smoother but later. Test any change on historical charts or a demo account.
Can I use the momentum indicator in forex on its own?
It is better used as context with price structure, trend and risk rules. On its own it gives many false readings in ranges.
Does the momentum indicator repaint?
On closed bars the value is fixed. On the current bar it changes until the bar closes.