Exponential Moving Average for Node.js.
Also suports Moving Variance.
$ npm install moving-averagevar timeInterval = 5 * 60 * 1000; // 5 minutes
var MA = require('moving-average');
var ma = MA(timeInterval);
setInterval(function() {
ma.push(Date.now(), Math.random() * 500);
console.log('moving average now is', ma.movingAverage());
console.log('moving variance now is', ma.variance());
});MIT