Decimal support?

[jgarzik]

Is it possible to plug in more accurate decimal types, such as https://github.com/paupino/rust-decimal ?

[greyblake]

Maybe.
Definition of Next trait is quite abstract:

pub trait Next<T> {
    type Output;
    fn next(&mut self, input: T) -> Self::Output;
}

But why accuracy of f64 is not enough for your case?

[jgarzik]

It's a no-floating-point project requirement (standard in certain financial software).

[greyblake]

I can understand this requirement for money transactions, accounting, etc.., But for technical analysis indicators it would not make much sense.

Some indicators (.e.g. EMA) really depend on seed data and initial state. This often differ from implementation to implementation. With reasonable amount data fed, different implementation would show more or less same result (but not absolutely equal with crazy engineering precision)

My point: this is not a reasonable requirement for TA indicators.