OptionalhighOptionallowLow column. Default 'low'.
OptionalmaxAcceleration ceiling. Default 0.2.
OptionalprefixColumn-family prefix — appends ${prefix} (the stop value) and
${prefix}Trend (+1 long / −1 short). Default 'psar'.
OptionalstepAcceleration increment — the step the factor grows by on each new
extreme, and its starting value. Default 0.02.
High column. Default
'high'.