# 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
IEnumerable<StcResult> results =
quotes.GetStc(cyclePeriods, fastPeriods, slowPeriods);
```

## Parameters

`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 quotes requirements

You must have at least `2×(S+C)`

or `S+C+100`

worth of `quotes`

, 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.

`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<StcResult>
```

- 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
`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

`Date`

* DateTime* - Date from evaluated

`TQuote`

`Stc`

* double* - Schaff Trend Cycle

### Utilities

See Utilities and helpers for more information.

## Chaining

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

```
// example
var results = quotes
.Use(CandlePart.HL2)
.GetStc(..);
```

Results can be further processed on `Stc`

with additional chain-enabled indicators.

```
// example
var results = quotes
.GetStc(..)
.GetRsi(..);
```