How to spot trend reversals using the Parabolic SAR strategy

Mastering the Parabolic SAR strategy can help traders spot potential trend reversals and time their trades more effectively. As a powerful trend reversal indicator and part of a stop-and-reverse trading system, it’s designed to enhance your decision-making with clearer entry and exit signals across different market conditions.

When maximising profits and minimising losses, timing is everything. Even for those who have a feel for the market, predicting when a trend will reverse is crucial. 

This is why the Parabolic SAR strategy has become so popular in recent years. “Stop and Reverse” (SAR) is a technical indicator designed to help traders identify potential trend reversals and fine-tune their entry and exit points.

What is the Parabolic SAR indicator, and how does it work?

The Parabolic SAR indicator is a trend-following technical indicator primarily used to identify potential reversals in market price direction. Developed by J. Welles Wilder Jr., it’s calculated using a mathematical formula that dynamically adjusts with price movements, giving traders the chance to recognise reversals and potential entry or exit points. 

It’s computed using the following components:

• SAR value: The current indicator value, which trails the price in a parabolic curve.

• Extreme Point (EP): The peak in an uptrend or the trough in a downtrend, updated whenever a new high or low is reached.

• Acceleration Factor (AF): A multiplier that starts at a default value, commonly 0.02, and increases incrementally each time a new EP is recorded, up to a maximum cap of around 0.20.

Those are the mechanics, but the basic gist is that the SAR places dots above each price bar when the price is falling, and below each price bar when the price is rising. A potential trend reversal is when the price passes through the dots, and the dots move to the other side. 

Make smarter trading decisions

Use expert analysis and tools on demo accounts or a live account.

Try now

Parabolic SAR quick insight

The formula when calculating the SAR value looks like this: 

Rising SAR = Prior SAR + Prior AF (Prior HP – Prior SAR)

Falling SAR = Prior SAR – Prior AF (Prior SAR – Prior LP)

You don’t need to memorise or even fully understand the calculations. If you’re using the parabolic SAR setting, most trading platforms, including Exness’, automatically calculate and plot it for you in real-time.

You can see the SAR dots switching from below the price bars to above them, signalling a shift from an uptrend to a downtrend. This visual cue can then help you identify moments when momentum is changing, allowing you to decide whether to enter or exit.

How to use the Parabolic SAR strategy in practice

The Parabolic SAR is a stop loss tool, but it can be versatile, used to signal reversals across a range of timeframes and asset classes—from forex pairs to commodities and stocks. 

For example, one of the most actively traded instruments in South Africa is the USDZAR currency pair, which reflects the exchange rate between the US dollar and the South African rand. Timing trades with this pairing can be challenging given its sensitivity to global economic factors and local developments, such as interest rate changes by the South African Reserve Bank. 

But that’s where Parabolic SAR comes into play. One of the simplest, most commonly used Parabolic SAR strategies is to wait for an SAR trade signal to enter in the trending direction following a pullback. 

Here, you can see that from around 07:45 to 08:30, the SAR dots switched from above the candles to below them, signalling a transition from a downtrend to an uptrend. For traders watching this, it would have correlated a clear rise in price during that period, giving a strong indication to enter a long position or exit a short one.

What are entry and exit signals?

There are specific indicators that traders use to decide when to open or close a trade. 

An entry signal, for instance, will tell traders that it’s a good time to initiate a position, based on the expectation that the price will move in a favourable direction. On the other hand, an exit signal will indicate that it’s wise to close an existing position, either to lock in profits or to limit losses. 

What other indicators should you combine with SAR?

Using the Parabolic SAR setting to present strong, reliable entry and exit signals can work by itself, but it’s always best to combine it with other indicators. 

• Moving Averages: Moving averages can confirm whether the trend indicated by the SAR dots aligns with the broader market trend. For example, if the Parabolic SAR signals a buy but the price is below the moving average, it might be a false signal, perhaps derived from a bearish or weakening market trend.

• RSI: RSI helps filter signals by confirming whether the market is ready for a reversal or continuation. For instance, if SAR signals an entry point but RSI shows overbought conditions, it might be wiser to wait.

• Average True Range (ATR): ATR measures market volatility, so this is another beneficial indicator for traders assessing whether a breakout is likely to have enough momentum to follow through.

• Moving Average Convergence Divergence (MACD): MACD is a momentum indicator showing the relationship between the price of two moving averages. Traders use this to confirm the trend signalled by Parabolic SAR, adding more confidence to trade entries or exits.

Other indicators include ADX, EMA, Bollinger Bands, and more. The Average Directional Index (ADX) is especially popular for confirming trend strength before acting on Parabolic SAR signals, helping traders filter out weaker or false setups. But remember, the indicators to use will be determined both by your trading style and the specific market conditions you’re dealing with.

What are the best SAR settings?

When using the Parabolic SAR, you’ll notice a few settings that can control how the indicator behaves and how sensitive it is to price movements. We set the default starting AF at 0.02, as mentioned previously, with an incremental step of 0.02 each time a new high or low is reached, up to a maximum AF of 0.20. On platforms like MetaTrader 4 (MT4), these settings are often labelled as “Step” (for the starting AF) and “Maximum” (for the maximum AF value).

A lower AF, however, can make the SAR less sensitive, which means it will react more slowly to price changes and produce fewer flip signals, ideal if you’re looking to catch longer-term trends. For most traders, the best parabolic SAR settings are the default ones because they provide a good balance between responsiveness and reliability, but it might depend on how you’re looking to trade. You can also explore other best tools for currency trading to see how the Parabolic SAR compares with popular indicators like RSI, MACD, and moving averages.

More active traders, such as scalpers, might experiment with a slightly higher starting AF to capture quicker shifts in momentum, while long-term traders might reduce the starting AF to 0.01 to smooth out the noise. Day traders and swing traders might also adjust the tool to find the best parabolic SAR settings based on specific market conditions.

What are the recommended settings for day traders vs swing traders?

Because day traders operate on shorter timeframes—anywhere from one-minute to one-hour charts—they need their indicators to respond quickly to intraday price shifts. A slightly higher starting AF can provide this, helping the Parabolic SAR to track price movements more closely and generate faster flip signals to capture short-lived moves. If you’re focusing on intraday setups, explore these best indicators for day trading to see how the Parabolic SAR fits within short-term trading strategies.

• Use a slightly higher starting AF, such as 0.03 or 0.04.
• Combine with a short-term trend filter, such as a 10-period EMA, to reduce false signals in volatile sessions.
• Focus on high-volume trading sessions to maximise the effectiveness of quick SAR flips.
• Backtest your chosen AF setting on historical intraday data to ensure it performs well.

Swing traders, on the other hand, typically hold positions for several days to a few weeks, meaning they need a balance between reactivity and noise reduction. The best parabolic SAR settings, in this case, are the default ones, although, in slower-moving markets, you might want to drop the starting AF to around 0.015 to focus only on significant turning points. Once again, here’s a quick walkthrough:

• Stick with the default starting AF of 0.02 and maximum AF of 0.20.
• In slower markets, lower the starting AF to 0.015.
• Apply on 4-hour to daily charts to align with multi-day or weekly trend changes.
• Combine with support and resistance analysis to improve entry timing within larger trends.

Here’s an example of the above settings, focused on slower-moving Forex pairs. You can see how lowering the starting AF has helped the SAR dots to avoid premature signals, giving swing traders less noise and ill-timed reversal signals to worry about.

Parabolic SAR strategy example: USDZAR trade walkthrough

Learning about the Parabolic SAR strategy—its nuts and bolts—is only part one. Anyone who begins a film’s part one, a book’s part one, or even an album’s part one, becomes ravenous for part two. Traders are no different, because part two is where the activity comes in, when you head to charts, make decisions, and trade.

But don’t get ahead of yourself. There’s still more reading and learning to do. Let’s walk through the USDZAR pairing.

In this case, you would set up your chart using a 15-minute timeframe and apply the Parabolic SAR indicator with a slightly higher starting AF of 0.03. Add a 10-period EMA to help identify the overall trend direction, and then begin by confirming that the USDZAR pair is in a strong uptrend. This is shown when the price stays above the EMA, and the EMA line slopes upwards. 

As the trend progresses, the price may pull back towards the EMA. During this pullback, the SAR dots will often flip above the price bars, signalling a brief pause or minor reversal in the trend. Instead of rushing into a trade, wait patiently. 

Watch the SAR dots and wait for them to flip back below the price bars. This will indicate the uptrend is resuming, and that the buying momentum is still intact, making it a good time to enter a long position. 

Once in the trade, you’ll continue to monitor the SAR dots closely. When they flip back above the price bars, this will signal a potential trend reversal, so that would be your cue to exit the position and lock in your profits.

Here, you can see an example of the 15-minute chart with a 10-period EMA and Parabolic SAR. In many instances, there are flips above and below the price. These are the signals for pullbacks and trend resumptions mentioned above, with both the SAR dots and EMA illustrating the entry and exit points.

Tips for using Parabolic SAR strategy effectively

Parabolic SAR is a trailing stop loss tool, designed to help you lock in profits as trends progress. While it can signal potential reversals, combining it with other indicators and solid risk management strategies will likely improve your trading results. Traders have to be aware of these few tips for using the strategy effectively:

• Use in trending markets: Parabolic SAR works best during clear uptrends or downtrends, so avoid relying on it in sideways markets where false signals are common. In these conditions, the indicator may produce frequent flip signals (known as whipsaws) that don’t correspond to meaningful trend changes.

• Combine with trend indicators: Pairing Parabolic SAR with trend-following tools can help to confirm trend direction and reduce false signals.

• Watch for reversal confirmation: Don’t exit or enter trades solely on a Parabolic SAR reversal signal. Wait for confirmation from volume or price action.

• Use as a trailing stop loss: Implement Parabolic SAR dots as trailing stop loss levels to protect profits and limit losses as the trend evolves.

• Avoid overtrading: The Parabolic SAR indicator can generate frequent signals, especially if the market is volatile. Be selective about when you’re entering, and avoid jumping in on every signal.

Exness Trade app

Trade with confidence anytime, anywhere.

Download now

Frequently asked questions on Parabolic SAR indicator strategy

Final thoughts: Is the Parabolic SAR strategy right for you?

The Parabolic SAR strategy can be a very useful tool for traders who want clear entry and exit signals, but whether it fits your style depends largely on your trading approach and risk tolerance. Pair it effectively depending on your overall trading strategy to find that “meat-and-potatoes combo.”

In other words, yes, Parabolic SAR is effective, but there are numerous effective indicators you can use to refine your trades. The point is to explore, experiment, and make sure you’re comfortable with how a strategy fits your system. Take time to test different Parabolic SAR settings to see how each adjustment affects your signals and overall performance in real-market conditions.