SAR Settings for Reversal Trading
While the Parabolic SAR is primarily a trend-following indicator, it can also be used to identify potential trend reversals. A reversal trader is looking to enter a trade at the very beginning of a new trend. This is a high-risk, high-reward strategy. The SAR can be a useful tool for this, but it requires a different approach to its settings. A reversal trader will use a very sensitive SAR setting, such as (0.05, 0.2), to get the earliest possible signal of a trend change.
The idea is not to ride the new trend for a long time, but to capture the initial, explosive move that often occurs at a market turning point. The trader is looking for a quick profit and will exit the trade at the first sign of weakness. A tight trailing stop loss is essential for this strategy. The SAR itself can be used as the trailing stop, but with the sensitive settings, the trader must be prepared for a quick exit.
Reversal trading with the SAR is best done at key support and resistance levels. A SAR sell signal that occurs at a major, multi-year resistance level is more likely to be valid than a signal that occurs in the middle of a trading range. The reversal trader is combining price action analysis with the SAR to identify high-probability turning points in the market.
The 'SAR Squeeze'
The 'SAR Squeeze' is a specific chart pattern that can signal an impending breakout. It occurs when the Parabolic SAR dots move very close to the price during a period of consolidation. This indicates that the trend is losing momentum and the market is building energy for its next move. The 'squeeze' is the visual representation of this compression of energy. When the price finally breaks out of the consolidation, the move is often fast and powerful.
A trader can identify a SAR Squeeze by looking for a flattening of the SAR dots. In a strong trend, the SAR dots will be steeply angled. As the trend weakens and the market enters a range, the SAR dots will start to move sideways, getting closer and closer to the price. This is the signal to get ready for a potential trade.
The breakout from a SAR Squeeze can occur in either direction. A trader should wait for a clear break of the consolidation range before entering a trade. A buy stop can be placed above the top of the range, and a sell stop can be placed below the bottom of the a range. The first stop to be triggered gets the trader into the trade. The other order is then cancelled.
Worked Trade Example: Reversal Trade on GC
A trader is watching the daily chart of Gold (GC). The price has been in a downtrend for several weeks but is now approaching a major support level at $1,900. The trader is looking for a potential reversal to the upside. They are using a sensitive SAR setting of (0.04, 0.2) to get an early entry.
- The Setup: The price of GC touches the $1,900 support level and bounces. The next day, the SAR dot flips below the price, giving a buy signal at $1,910.
- Entry: The trader buys one GC futures contract at $1,910.
- Stop Loss: The initial SAR value is $1,895. The trader places a stop loss at $1,894, just below the SAR and the support level.
- Profit Target: The trader is looking for a quick profit. They set a profit target at $1,930, which is a previous area of resistance. The risk is 16 points ($1,910 - $1,894). The potential reward is 20 points ($1,930 - $1,910). The risk-reward ratio is 1:1.25.
The price of GC rallies sharply off the support level. The sensitive SAR setting got the trader into the trade near the very bottom of the move. The price hits the profit target of $1,930 the next day. The trader exits with a profit of 20 points, or $2,000.
This example shows how a sensitive SAR setting can be used to enter a reversal trade at a key support level. The trader was able to capture a quick and substantial profit by getting in early.
The Limitations of Backtesting SAR Settings
Backtesting is the process of testing a trading strategy on historical data. It is an essential step in the development of any trading system. However, traders need to be aware of the limitations of backtesting, especially when it comes to optimizing SAR settings. The main limitation is that past performance is not indicative of future results. A set of SAR settings that worked well in the past may not work well in the future.
Another limitation is the risk of curve fitting, which was discussed earlier. It is easy to create a strategy that looks perfect on a small sample of historical data. A trader must use a large and varied dataset to avoid this trap. The data should cover different market regimes, including bull markets, bear markets, and sideways markets.
Finally, backtesting does not account for the psychological pressures of live trading. It is easy to follow a system in a backtest, where there is no real money at stake. It is much harder to follow the same system in a live market, with real money on the line. A trader must have the mental fortitude to execute their plan, even when faced with fear and greed. Backtesting can give a trader confidence in their system, but it cannot replace the experience of live trading.
Key Takeaways
- Sensitive SAR settings can be used for reversal trading, but this is a high-risk strategy.
- The 'SAR Squeeze' pattern can signal an impending breakout.
- Backtesting is an essential part of strategy development, but it has its limitations.
- Past performance is not a guarantee of future results.
- The psychological challenges of live trading cannot be simulated in a backtest.
