How to get max of subseries in Pine script

Question

Lets suppose we have series of numbers. It contains some values [..., 3, 6, 4, 7]. I would like to get maximum of 100 last elements.

I tried max(series[100]), but it looks like series[100] operator returns sub-series discarding last 100 elements.

Solution

That's correct. In Pine-script everything become a series, even a constant once you are using it, since all functions return a series. This means, that you can always put (non-series) constants in, but you can never get them out.

I think what you want is:

//@version=3
study("Max of N", shorttitle="max", overlay=false)
nmax = highest(n, 100) // n is the series of ALL bars
plot(nmax, style=line)

Comments

[Jan]

Hi, thank you for answer. Is it possible to get highest of last n candles without current bar (closed only)? And what about skipping weekend candles?

[not2qubit]

@Jan Those are two different questions. Just search for them here first, and if there are no such questions then make sure to ask them in it's own separate question.

[karatedog]

@Jan: in Pine everything is a series. close is a series, and close[1] is a series as well, that is just shifted 1 item and start from [1]. As close[1] is a series in itself, and you can have the previous value from a series by using index [1], it is perfectly valid to write this: price_val = (close[1])[1].