OptionalcloseOptionalhighHigh column. Default 'high'.
OptionallowLow column. Default 'low'.
OptionaloutputName of the appended column. Default 'cci'.
OptionalperiodLook-back in bars. Default 20 (ChartIQ's; Lambert's original
and TA-Lib's own default are both shorter — see the docstring).
Close column. Default
'close'.