Parabolic SAR with alerts
Nov 25, 2019

The Parabolic SAR with alerts indicator provides a trend-following tool that identifies potential reversal points in market price action through visual markers and automated notifications.
Usage
The Usage section focuses on identifying trend direction and potential entry or exit points based on the Parabolic SAR (Stop and Reverse) dots.
- Trend Identification: When the dots are located below the price bars, the market is generally considered to be in an uptrend. Conversely, when the dots are above the price bars, the market is in a downtrend.
- Reversals: A bullish signal is generated when the SAR flips from being above the price to below it, represented by a green triangle up. A bearish signal occurs when the SAR flips from below the price to above it, represented by a red triangle down.
- Alerts: The script includes built-in alerts that trigger on the close of a bar when a trend reversal is detected, allowing users to stay informed of directional shifts without constantly monitoring the chart.
Details
This tool calculates the Parabolic SAR using standard acceleration factors. The calculation involves an acceleration factor that increases as the trend moves in a favorable direction, allowing the "stop" level to trail the price more closely.
The script specifically identifies the exact moment of a crossover (the "flip") to plot shapes (triangles) and trigger alerts. The logic ensures that a bullish signal is only marked when the current SAR value is below the high and the previous SAR value was above the low, confirming the transition.
Settings
- Start: The initial value for the acceleration factor (default is 0.02).
- Increment: The step by which the acceleration factor increases each time the price makes a new high (for uptrends) or low (for downtrends) (default is 0.02).
- Maximum: The ceiling for the acceleration factor, preventing the SAR from moving too close to the price (default is 0.2).
FAQ
How do I use the Parabolic SAR with alerts?
You can apply the indicator to your chart and look for the triangle shapes to identify trend reversals. You can also set up TradingView alerts using the "Buy SAR" and "Sell SAR" conditions.
What do the triangles represent?
The green triangle up indicates a bullish trend reversal (SAR flipped below price), while the red triangle down indicates a bearish trend reversal (SAR flipped above price).
Where can I access this tool?
You can get access on the LuxAlgo Library for charting platforms like TradingView, MetaTrader (MT4/MT5), and NinjaTrader for free.
Trading & investing are risky and many will lose money in connection with trading and investing activities. All content on this site is not intended to, and should not be, construed as financial advice. Decisions to buy, sell, hold or trade in securities, commodities and other investments involve risk and are best made based on the advice of qualified financial professionals. Past performance does not guarantee future results.
Hypothetical or Simulated performance results have certain limitations. Unlike an actual performance record, simulated results do not represent actual trading. Also, since the trades have not been executed, the results may have under-or-over compensated for the impact, if any, of certain market factors, including, but not limited to, lack of liquidity. Simulated trading programs in general are designed with the benefit of hindsight, and are based on historical information. No representation is being made that any account will or is likely to achieve profit or losses similar to those shown.
Testimonials appearing on this website may not be representative of other clients or customers and is not a guarantee of future performance or success.
As a provider of technical analysis tools and strategies, we do not have access to the personal trading accounts or brokerage statements of our customers. As a result, we have no reason to believe our customers perform better or worse than traders as a whole based on any content, tool, or platform feature we provide.
Charts used on this site are by TradingView in which the majority of our technical indicators are built on. TradingView® is a registered trademark of TradingView, Inc. www.TradingView.com TradingView® has no affiliation with the owner, developer, or provider of the Services described herein.
Market data is provided by CBOE, CME Group, BarChart, Massive, CoinAPI. Select U.S. equities data is provided through Massive. CBOE BZX real-time U.S. equities data is licensed from CBOE and provided through BarChart. Real-time futures data is licensed from CME Group and provided through BarChart. Select cryptocurrency data, including major coins, is provided through CoinAPI. All data is provided “as is” and should be verified independently for trading purposes.
This does not represent our full Disclaimer. Please read our full disclaimer.
© 2026 LuxAlgo Global, LLC.

