New creates an EMA with the given default value and alpha.

NewDuration is like New but using time.Duration.

NewDurationWithBeta is the same as NewDuration but supplies a seperate beta to control the decrease rate.

NewWithBeta is the same as New but supplies a seperate beta to control the decrease rate.

EMA holds the Exponential Moving Average of a float64 with a the given default α value and a fixed scale of 3 digits.