The middle line can be configured with the parameter Middle line type as:
MID_TYPE_NONE=0,Β Β Β Β // None
MID_TYPE_MEDIAN=1,Β // Median, (high + low)/2
MID_TYPE_TYPICAL=2, // Typical, (high + low + close)/3
MID_TYPE_WEIGHTED=3 // Average, (high + low + close + close)/4β
MID_TYPE_MEDIAN=1,Β // Median, (high + low)/2
MID_TYPE_TYPICAL=2, // Typical, (high + low + close)/3
MID_TYPE_WEIGHTED=3 // Average, (high + low + close + close)/4β