This gem adds methods to the Array class to compute different types of moving averages.


Add this line to your application's Gemfile:

gem 'moving_average'

And then execute:

$ bundle

Or install it yourself as:

$ gem install moving_average


To compute a simple moving average (SMA), you can use

a = [1, 2, 3, 4, 5]
a.simple_moving_average => 3


a.sma => 3

You could also find the SMA of the 3-element slice [1, 2, 3] of the Array using

a.sma(2, 3) => 2

or the 4-element slice [1, 2, 3, 4] by using

a.sma(3, 4) => 2.5

An exponential moving average (EMA), a smoothed moving average (SMMA), and a weighted moving average (WMA) may be computed in the same way.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request