The function has a parameter input called "nbdev." Can anyone tell me what it is? I've gotten used to thinkorswim's standard deviation indicator which only takes period as an input so I'm just very curious as to what nbdev is and what changing it from 1 would do.
Thanks in advance!
just in case: http://mrjbq7.github.io/ta-lib/func_groups/statistic_functions.html
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