OptionalcloseOptionalcolumnThe field measured against its own average. Default: whatever close
resolves to, so redirecting close moves both halves together.
OptionalhighHigh column (true-range input). Default 'high'.
OptionallowLow column (true-range input). Default 'low'.
OptionaloutputAppended column name. Default 'pgo'.
OptionalperiodLook-back of both the simple average and the true-range average, in
bars. Default 14.
Close column (true-range input). Default
'close'.