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Smoothed Moving Average (SMMA)

get_smma(quotes, lookback_periods)

Parameters

name	type	notes
`quotes`	Iterable[Quote]	Iterable(such as list or an object having `__iter__()`) of the Quote class or its sub-class. • Need help with pandas.DataFrame?
`lookback_periods`	int	Number of periods (`N`) in the moving average. Must be greater than 0.

Historical quotes requirements

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

quotes is an Iterable[Quote] collection of historical price quotes. It should have a consistent frequency (day, hour, minute, etc). See the Guide for more information.

Return

SMMAResults[SMMAResult]

This method returns a time series of all available indicator values for the quotes provided.
SMMAResults is just a list of SMMAResult.
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 N-1 periods will have None values since there’s not enough data to calculate.

Convergence warning: The first N+100 periods will have decreasing magnitude, convergence-related precision errors that can be as high as ~5% deviation in indicator values for earlier periods.

SMMAResult

name	type	notes
`date`	datetime	Date
`smma`	float, Optional	Smoothed moving average

Utilities

See Utilities and Helpers for more information.

Example

from stock_indicators import indicators

# This method is NOT a part of the library.
quotes = get_history_from_feed("SPY")

# Calculate 20-period SMMA
results = indicators.get_smma(quotes, 20)

About Smoothed Moving Average (SMMA)

Smoothed Moving Average is the average of Close price over a lookback window using a smoothing method. SMMA is also known as modified moving average (MMA) and running moving average (RMA). [Discuss]