peek() method

[rlf89]

nextValue() method is cool, but in my bot i have some intermediate values between candle closes. It would be great if here would be some peek() method where i could see intermediate result without updating internal state. At the moment i hit the wall and have to just use RSI.calculate() to calculate whole thing every time.
I will look more deeply in the library myself, but at the moment just pointing out this enhancement proposal.