3.0.0-preview.2

We’ve released a new preview release for v3 of the Stock Indicators for .NET NuGet package, containing widely implemented streaming style indicators.
See Skender.Stock.Indicators @ NuGet.org for more information.

Warning

Preview releases are experimental and volatile with breaking changes and conventions.

Note

There will be a series of preview releases that implement streaming use cases. We expect possibly 1-2 additional preview pre-releases before we make an official stable v3 package.

• see #1014 for overall v3 progress

What's Changed

• wide implementation of buffer list incrementing indicators, and streaming hubs

Full Changelog: 3.0.0-preview.1...3.0.0-preview.2

Feedback appreciated in discussion #1018

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Incrementally add data with buffer lists

For scenarios where quotes arrive one at a time, buffer lists provide efficient incremental processing without recalculating the entire history.

// create list
SmaList<SmaResult> smaList = new(lookbackPeriods: 20);

// add new quotes incrementally
smaList.Add(newQuote);

Buffer lists maintain internal state and automatically manage the warmup period, making them ideal for basic live data feeds and incremental updates.

Streaming hubs with observer patterns

Hubs provides a reactive, subscription-based pattern for streaming market data with automatic cascading calculations for advances scenarios.

// create provider with chain of indicators
QuoteHub provider = new QuoteHub();
SmaHub smaHub = provider.ToSmaHub(20);
RsiHub rsiHub = smaHub.ToRsiHub(14);  // RSI of SMA

// publish quotes - observers auto-update in cascade
provider.Add(newQuote);

// consume downstream hubs indicators
IReadOnlyList<RsiResult> = rsiHub.Results;

The observer cascade ensures that when a new quote arrives, all chained indicators update automatically in the correct sequence.