Calculating moving averages

[Seal]

I'm hoping to gain a better understanding of how moving averages are calculated. On bitcoincharts.com, you can choose to display a moving average in a 1 minute interval, 5 minute interval, 10 minute, 30 minute, 1 hour etc...

My question is, how is a moving average calculated at these intervals? Are all the previous trades grouped in 5 minute blocks and the moving average is taken on that???

[freeAgent]

I don't have any connection to bitcoincharts, but that's how a moving average is calculated.  See: http://www.investopedia.com/terms/m/movingaverage.asp#axzz2897QFKcu