Parabolic SAR (stop-and-reverse)

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The Parabolic SAR (stop-and-reverse) function is based on the indicator developed by J. Welles Wilder, Jr. It is a lagging technical indicator that can help you to determine when a stock is set to have a change in trend. Applications of Parabolic SAR include generation of buy-sell signals and, in particular, determining when to exit from trades.

1. Syntax

```PARABOLSAR(d0,d1,s0,s1,Alignment)
```

2. Input

The Parabolic SAR formula requires the following input series:

• d0 - High data values - The first set of data values for which the Parabolic SAR is calculated, usually the daily high price of a stock.
• d1 - Low data values - The second set of data values for which the Parabolic SAR is calculated, usually the daily low price of a stock.

3. Parameters

The Parabolic SAR function has the following parameter:

• s0 - Acceleration Factor - The acceleration factor used in the calculations.
• s1 - Maximum Acceleration - The maximum value that the acceleration is allowed to reach.
• Alignment (Optional) – Hierarchy placeholder to be used as the alignment axis.

4. Output

The Parabolic SAR function generates the following output:

• Parabolic SAR - The Parabolic SAR result set.