Momentum and indicator strategies

RSI shows 78 on EUR/USD, a reading usually labelled “overbought”. So you sell, and price keeps climbing for another week. The mistake was the rule that turned that reading into a sell.

From indicator to rule

Period:

Set the period to 14 and watch RSI cross 70 and 30. Then tap MACD and compare when its line crosses the signal line. Every crossing you see comes after the price move that caused it.

An indicator is a calculation on past prices. On its own it tells you nothing to do. It becomes a strategy only when you attach rules: when to enter, when to exit and where the stop loss goes. Three rule families cover most indicator strategies:

RSI reversals. Buy when RSI drops below 30 (oversold), sell when it rises above 70 (overbought).
Direction crosses. Trade only longs while RSI is above 50, or when the MACD line crosses above its signal line.
Moving-average crossovers. Enter when a fast moving average crosses a slow one.

All three measure momentum: how hard price has been pushing recently. If you need a refresher on how each one is calculated, see Indicators 101.

Same indicator, two methods

Which method suits which market?

Fit of seven trading methods to four market conditions. Use the method buttons to see details.
TrendingTrend	RangingRange	Volatile / newsNews	QuietQuiet
Good	Poor	Mixed	Poor
Good	Poor	Poor	Mixed
Mixed	Poor	Good	Mixed
Poor	Good	Poor	Good
Good	Good	Mixed	Poor
Mixed	Good	Poor	Mixed
Poor	Poor	Mixed	Poor

Momentum indicators

Use indicators such as RSI or MACD to time entries: fading stretched readings, or joining when momentum turns.

When it works: Oscillator fades (RSI overbought or oversold) suit ranges; crossover rules behave more like trend following.
How it fails: In a strong trend RSI can stay "overbought" for weeks; in choppy markets crossovers flip back and forth. Indicators lag price.
Typical profile: Depends on the rule: fades often win more than half with smaller winners; crossover rules often win less than half with larger winners.
Holding time: Hours to days.

Read the lesson: Momentum indicators →

Momentum indicators sit between the methods: their fit depends on how the rule uses them. Illustrative: every market and setting differs.

An indicator has no method of its own; the rule you attach to it decides what it is.

An RSI reversal bets that a stretched move will snap back. That is mean reversion, so it inherits mean reversion’s conditions: it tends to work in ranges and suffer in trends. In a strong uptrend, “overbought” keeps getting more overbought, and each short is stopped out. Its profile is typically a win rate above half, with winners often smaller than losers.

A crossover rule bets that a move already under way will continue. That is trend following, so it suits trends and whipsaws in ranges, where the lines cross back and forth and each signal arrives as the move ends. It often wins fewer than half its trades, relying on a few larger winners.

Before you use any indicator rule, ask: am I betting on a snap-back or a continuation? Then check whether the market in front of you is ranging or trending. The range trading and trend following lessons cover each side in depth.

Indicators lag, so use them as filters

RSI(14) is built from the last 14 closes. A MACD cross confirms a move that has already happened. Every indicator lags price, so on its own it is late by design.

So use indicators as filters: an oversold RSI matters more when price is also sitting on tested support. A long-only rule while RSI is above 50 keeps you on the side of the trend. Agreement between price, a level and an indicator is called confluence.

There are no magic settings either. RSI 14 and MACD 12, 26, 9 are conventions, not discoveries. Changing a period until it would have caught last month’s turns is curve fitting: the setting fits the past and usually stops working on new data.

Example: an RSI reversal at range support on USD/JPY

USD/JPY has ranged between 149.00 and 150.60 on the H4 chart for two weeks. The range is the reason to consider a mean-reversion rule at all.
Price dips to 149.20, near support, and RSI(14) falls below 30. Indicator and level agree.
You buy at 149.25, with the stop at 148.85, 15 pips below support: 40 pips of risk.
Account $5,000, risk 1% = $50. Pip value per standard lot at about 150 = ¥1,000 ÷ 150 ≈ $6.67.
Position size: $50 ÷ (40 × $6.67) = 0.187, rounded down to 0.18 lots. Money at risk: 40 × 0.18 × $6.67 ≈ $48.
Two days later RSI crosses back above 50 with price at 149.80, near the middle of the range. You exit: +55 pips, which is 55 ÷ 40 = 1.375R.
Result: 55 × 0.18 × $6.67 ≈ $66, about 1.3% of the account. Had price broken below 149.00 instead, the stop would have cost about $48, or roughly 1%.

Try it

Strategy

Market

The rules

Prices: 240 simulated closes starting at 1.0850, moving 8–12 pips a bar at random. Trending: a steady drift that changes direction once or twice. Ranging: always pulled back towards one level, staying within roughly 60 pips either side. Mixed: range, then trend, then range.
ATR (a measure of normal movement): average size of the last 14 bar-to-bar moves × 1.6.
Trend (MA cross): when the 10-bar average crosses the 40-bar average, enter in that direction. Stop 2 × ATR away. Exit (and reverse) on the next cross, or at the stop.
Breakout: buy a close above the highest close of the last 20 bars, sell a close below the lowest. Stop at the middle of that 20-bar channel. Exit when price closes beyond the opposite 10-bar extreme, or at the stop.
Range fade: buy a close below the lower Bollinger band (20-bar average − 2 standard deviations), sell above the upper. Target the 20-bar average. Stop 1.5 standard deviations beyond entry. Exit after 20 bars if neither is hit.
RSI reversal: buy when RSI(14) drops below 30, sell when it rises above 70. Exit when RSI crosses 50, or at a stop 2 × ATR away.
Every strategy: one trade at a time, entered at the close. Stops are checked on each close, so a loss can be slightly more than 1R. Each result is measured in R (the distance to the first stop) after a 1-pip cost.

Trades

Win rate

Avg win

Avg loss

Expectancy (per trade)

Total

Max drawdown

Simulated prices, not real data. RSI(14) below 30 buys, above 70 sells, exit when RSI crosses 50, stop 2 × ATR. Results here are not a forecast.

Notice how, in the ranging market, the few RSI signals mostly snap back towards the middle: several small wins and one loss. Now switch Market to Trending. Notice how the same rule keeps selling “overbought” and buying “oversold” against the trend, and the stops pile up. Then press New prices a few times: single runs vary a lot.

Quick check

Question 1 of 5
An RSI rule buys below 30 and sells above 70. Which method does it behave like?
Question 2 of 5
EUR/USD is in a strong uptrend and RSI has been above 70 for a week. What does that tell you?
Question 3 of 5
Where do moving-average and MACD crossover rules usually struggle?
Question 4 of 5
You change RSI from 14 to 11 because 11 would have caught last month's turns better. What is the risk?
Question 5 of 5
You risk 40 pips and exit 55 pips in profit. What is the result in R?

Go deeper: RSI indicator explained · MACD indicator explained · Moving averages in forex