The Parabolic Stop and Reverse (SAR) is a technical indicator used in trading to find the direction of the price of an asset as well as to detect points of reversal. It assists traders make decisions about entering or exiting trades depending on the prevailing trends and possible reversals.
Developed by J. Welles Wilder during the 1970s, the Parabolic SAR is widely used in various financial markets, including the stock market, commodities, and forex. Its function is straightforward: track trends and help traders identify when they should change their positions.
1. Trend direction: The Parabolic SAR helps determine whether an asset is in an uptrend or downtrend. It does this by positioning dots above or below the price line.
Bullish trend: When the dots are below the price, it signals an uptrend.
Bearish trend: When the dots are above the price, it signals a downtrend.
2. Stop and reverse: The "SAR" part of the name stands for "Stop and Reverse." This indicates the spot at which the trend is supposed to reverse, giving the traders a cue to close their current position and even enter the opposite one.
3. Acceleration Factor (AF): The Parabolic SAR uses an acceleration factor that determines how quickly the dots move toward the price. The AF starts at 0.02 and increases by 0.02 for each new high or low, up to a maximum of 0.20. This accelerates the trend-following process, helping traders identify reversals faster.
4. Calculation: The formula for calculating the Parabolic SAR is:
SAR = SAR(previous) + AF × (EP - SAR(previous))
EP is the extreme point (highest high or lowest low) reached during the current trend. This calculation helps plot the Parabolic SAR dots on a price chart.
In the Indian stock market, the Parabolic SAR can be used to identify trends in both large-cap and small-cap stocks, as well as in commodities and forex. The Indian market is known for its volatility, making trend-following tools like the Parabolic SAR highly useful.
For example, if you're trading in the Nifty 50 or Sensex, the Parabolic SAR can indicate whether the overall trend is bullish or bearish. Similarly, for individual stocks like Reliance Industries or Tata Consultancy Services, the indicator can help identify potential reversals in price movement.
However, the Parabolic SAR is best used in trending markets. It may not be as effective in sideways or range-bound markets, as it may give false signals in such conditions.
1. Identifying trend reversals: The primary function of the Parabolic SAR is to identify potential trend reversals. Traders look for the point where the dots shift from being below the price (indicating an uptrend) to above the price (indicating a downtrend), or vice versa. This is a signal to either enter or exit a trade.
2. Setting stop-loss levels: Since the Parabolic SAR follows the price, it can be used to set trailing stop-loss orders. For instance, if you're in a long trade and the price is rising, the SAR will move up with the price. As the dots rise, you can adjust your stop-loss to protect profits. When the SAR dots appear above the price, it signals the potential for a reversal, and you might want to exit the trade.
3. Confirming other indicators: While the Parabolic SAR is useful on its own, it can be more effective when combined with other technical indicators. For example, if the SAR shows a reversal point and a moving average crossover (such as the 50-day and 200-day moving average) confirms the trend change, it strengthens the signal for traders.
4. Avoiding false signals: In volatile markets or during consolidation phases, the Parabolic SAR might give false signals. It's essential to be cautious and use additional indicators, such as the Relative Strength Index (RSI) or the Moving Average Convergence Divergence (MACD), to confirm the trend before making any major trading decisions.
Following are some of the strengths of the Parabolic SAR:
1. Clear entry and exit points: The Parabolic SAR is straightforward and easy to interpret, making it ideal for traders who prefer clear entry and exit points. This can be especially useful for beginners in the Indian market who are still learning to navigate technical indicators.
2. Effective in trending markets: The Parabolic SAR works best when the market is in a clear uptrend or downtrend. In such conditions, it can help traders ride the trend for a longer period, capturing substantial profits.
3. Trend-following: The Parabolic SAR is a trend-following indicator. Once the trend is established, the SAR helps traders stay in the trade, protecting profits and reducing the risk of premature exits.
Following are some of the weaknesses of the Parabolic SAR:
1. False signals in sideways markets: The Parabolic SAR can give false signals during sideways or range-bound markets, as the indicator will flip back and forth, showing potential reversals that never materialise.
2. Lagging indicator: Like many trend-following indicators, the Parabolic SAR is a lagging indicator. It follows the price movement and may not provide real-time entry points. This means that the trader may miss some part of the trend or enter too late.
3. Not suitable for short-term trading: Due to its reliance on price movement and trend-following nature, the Parabolic SAR is not ideal for very short-term or intraday trading, especially in highly volatile stocks.
1. Bullish signal: When the dots appear below the price and the price is rising, it indicates a bullish trend. Traders can enter long positions, expecting the price to continue rising.
2. Bearish signal: When the dots are above the price and the price is falling, it indicates a bearish trend. Traders can enter short positions, anticipating further price decline.
3. Reversal signal: If the dots switch positions (from below the price to above or vice versa), it signals a trend reversal. This is a key moment for traders to decide whether to exit their current positions and enter a new trade in the opposite direction.
1. Parabolic SAR and moving averages: Combining the Parabolic SAR with moving averages (like the 50-day or 200-day MA) can help confirm the trend. If both indicators show a bullish or bearish trend, the signal becomes stronger.
2. Parabolic SAR and RSI: The Relative Strength Index (RSI) is used to identify overbought or oversold conditions. Combining RSI with the Parabolic SAR can help confirm whether a trend reversal is imminent or if the asset is in overbought or oversold territory.
3. Parabolic SAR and MACD: The Moving Average Convergence Divergence (MACD) indicator is used to identify trend changes and momentum. When the MACD confirms the signal from the Parabolic SAR, it strengthens the case for a trend reversal or continuation.
The Parabolic SAR is a simple yet effective tool for identifying trends and potential reversals in the stock, commodity, and forex markets. While it works well in trending markets, it may provide false signals during sideways movement. To use it effectively, traders should combine it with other indicators and adjust their strategies based on market conditions.
Parabolic SAR settings should be adjusted based on the volatility and timeframe you're trading. For highly volatile markets, consider using a lower acceleration factor (around 0.015) to reduce whipsaws. When trading longer timeframes like daily or weekly charts, a lower acceleration factor setting helps prevent premature exits, while shorter timeframes might benefit from higher settings up to 0.025.
The Parabolic SAR can help identify which sectors are experiencing strong trends and potential rotation by comparing SAR behaviour across different sector exchange-traded funds or indices. When multiple stocks in a sector show similar SAR patterns (dots flipping from below to above prices), it may signal broader sector weakness.
The indicator can also help identify market phases by observing the frequency of SAR reversals—fewer reversals typically indicate stronger directional trends, while frequent flips suggest consolidation or choppy markets. Applying SAR to market breadth indicators can further enhance your ability to spot significant market phase transitions.
Parabolic SAR tends to perform more consistently in developed markets like the US and Europe where liquidity is higher and price movements are sometimes less erratic. Markets like India may require more careful calibration of the acceleration factor due to their higher inherent volatility and potential for price gaps. Cultural trading patterns can influence SAR effectiveness; for instance, some Asian markets have historically shown stronger trend-following characteristics where SAR might perform better.
This article is for informational purposes only and does not constitute financial advice. It is not produced by the desk of the Kotak Securities Research Team, nor is it a report published by the Kotak Securities Research Team. The information presented is compiled from several secondary sources available on the internet and may change over time. Investors should conduct their own research and consult with financial professionals before making any investment decisions. Read the full disclaimer here.
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