Schaff Trend Cycle

Created by Doug Schaff, the Schaff Trend Cycle is a stochastic oscillator view of two converging/diverging exponential moving averages. In other words, it's a Stochastic Oscillator of Moving Average Convergence / Divergence (MACD). [Discuss] 💬

// C# usage syntax
IReadOnlyList<StcResult> results =
  bars.ToStc(cyclePeriods, fastPeriods, slowPeriods);

Parameters

param	type	description
cyclePeriods	int	Number of periods (C) for the Trend Cycle. Must be greater than or equal to 0. Default is 10.
fastPeriods	int	Number of periods (F) for the faster moving average. Must be greater than 0. Default is 23.
slowPeriods	int	Number of periods (S) for the slower moving average. Must be greater than fastPeriods. Default is 50.

Historical price bars requirements

You must have at least 2×(S+C) or S+C+100 worth of bars, whichever is more, to cover the warmup and convergence periods. Since this uses a smoothing technique, we recommend you use at least S+C+250 data points prior to the intended usage date for better precision.

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

Response

IReadOnlyList<StcResult>

• This method returns a time series of all available indicator values for the bars provided.
• It always returns the same number of elements as there are in the historical price bars.
• It does not return a single incremental indicator value.
• The first S+C slow periods will have null values since there's not enough data to calculate.

🚩 ⚞ Convergence warning

The first S+C+250 periods will have decreasing magnitude, convergence-related precision errors that can be as high as ~5% deviation in indicator values for earlier periods.

StcResult

property	type	description
Timestamp	DateTime	Date from evaluated TBar
Stc	double	Schaff Trend Cycle

Utilities

• .Condense()
• .Find(lookupDate)
• .RemoveWarmupPeriods()
• .RemoveWarmupPeriods(removePeriods)

See Utilities and helpers for more information.

Chaining

This indicator may be generated from any chain-enabled indicator or method.

// example
var results = bars
    .Use(CandlePart.HL2)
    .ToStc(..);

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

// example
var results = bars
    .ToStc(..)
    .ToRsi(..);

See Chaining indicators for more.

Streaming

Use the buffer-style List<T> when you need incremental calculations without a hub:

StcList stcList = new(cyclePeriods, fastPeriods, slowPeriods);

foreach (IBar bar in bars)  // simulating stream
{
  stcList.Add(bar);
}

// based on `ICollection<StcResult>`
IReadOnlyList<StcResult> results = stcList;

Subscribe to a BarHub for advanced streaming scenarios:

BarHub barHub = new();
StcHub observer = barHub.ToStcHub(cyclePeriods, fastPeriods, slowPeriods);

foreach (IBar bar in bars)  // simulating stream
{
  barHub.Add(bar);
}

IReadOnlyList<StcResult> results = observer.Results;

See Buffer lists and Stream hubs for full usage guides.