Library "AllTimeHighLow" Provides functions calculating the all-time high/low of values.
hi(val) Calculates the all-time high of a series. Parameters: val: Series to use (`high` is used if no argument is supplied). Returns: The all-time high for the series.
lo(val) Calculates the all-time low of a series. Parameters: val: Series to use (`low` is used if no argument is supplied). Returns: The all-time low for the series.