MQL5 ReferenceStandard LibraryIndicatorsTrend IndicatorsCiEnvelopesLower MaPeriodMaShiftMaMethodDeviationAppliedCreateUpperLowerType Lower Returns the buffer element of the lower line by the specified index. double Lower( int index // index ) Parameters index [in] Lower line buffer element index. Return Value The buffer element of the lower line by the specified index, or EMPTY_VALUE if there is no correct data. Upper Type