OptionalcloseOptionalhighHigh column (the range's upper input). Default 'high'.
OptionallongSpan of the first EMA applied to both the numerator and the
denominator, in bars. Default 25 (Blau's r).
OptionallowLow column (the range's lower input). Default 'low'.
OptionalperiodLook-back for the highest high / lowest low, in bars.
Default 13 (Blau's q).
OptionalprefixColumn-family prefix — appends ${prefix} and ${prefix}Signal.
Default 'smi'.
OptionalshortSpan of the second EMA, applied to the first's output, in bars.
Default 2 (Blau's s).
OptionalsignalSignal EMA span in bars, taken over the SMI line. Default 3.
The field measured against the range's midpoint. Default
'close'.