« »

Parabolic SAR

Created by J. Welles Wilder, Parabolic SAR (stop and reverse) is a price-time based indicator used to determine trend direction and reversals. [Discuss] 💬

chart for Parabolic SAR

// C# usage syntax (standard)
IEnumerable<ParabolicSarResult> results =
  quotes.GetParabolicSar(accelerationStep, maxAccelerationFactor);

// alternate usage with custom initial Factor
IEnumerable<ParabolicSarResult> results =
  quotes.GetParabolicSar(accelerationStep, maxAccelerationFactor, initialFactor);

Parameters

accelerationStep double - Incremental step size for the Acceleration Factor. Must be greater than 0. Default is 0.02

maxAccelerationFactor double - Maximum factor limit. Must be greater than accelerationStep. Default is 0.2

initialFactor double - Optional. Initial Acceleration Factor. Must be greater than 0 and not larger than maxAccelerationFactor. Default is accelerationStep.

Historical quotes requirements

You must have at least two historical quotes to cover the warmup periods; however, we recommend at least 100 data points. Initial Parabolic SAR values prior to the first reversal are not accurate and are excluded from the results. Therefore, provide sufficient quotes to capture prior trend reversals, before your intended usage period.

quotes is a collection of generic TQuote historical price quotes. It should have a consistent frequency (day, hour, minute, etc). See the Guide for more information.

Response

IEnumerable<ParabolicSarResult>

This method returns a time series of all available indicator values for the quotes provided.
It always returns the same number of elements as there are in the historical quotes.
It does not return a single incremental indicator value.
The first trend will have null values since it is not accurate and based on an initial guess.

ParabolicSarResult

Date DateTime - Date from evaluated TQuote

Sar double - Stop and Reverse value

IsReversal bool - Indicates a trend reversal

Utilities

See Utilities and helpers for more information.

Chaining

Results can be further processed on Sar with additional chain-enabled indicators.

// example
var results = quotes
    .GetParabolicSar(..)
    .GetEma(..);

This indicator must be generated from quotes and cannot be generated from results of another chain-enabled indicator or method.