# Hull Moving Average (HMA)

##
**get_hma**(*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 1. |

### Historical quotes requirements

You must have at least `N+(integer of SQRT(N))-1`

periods of `quotes`

to cover the warmup periods.

`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

```
HMAResults[HMAResult]
```

- This method returns a time series of all available indicator values for the
`quotes`

provided. -
`HMAResults`

is just a list of`HMAResult`

. - 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+(integer of SQRT(N))-1`

periods will have`None`

values since there’s not enough data to calculate.

### HMAResult

name | type | notes |
---|---|---|

`date` |
datetime | Date |

`hma` |
float, Optional | Hull 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 HMA
results = indicators.get_hma(quotes, 20)
```

## About Hull Moving Average (HMA)

Created by Alan Hull, the Hull Moving Average is a modified weighted average of `close`

price over `N`

lookback periods that reduces lag.
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