MQL5 ReferenceStandard LibraryIndicatorsTrend IndicatorsCiBandsBase MaPeriodMaShiftDeviationAppliedCreateBaseUpperLowerType Base Returns the buffer element of the base line by the specified index. double Base( int index // index ) Parameters index [in] Base line buffer element index. Return Value The buffer element of the base line by the specified index, or EMPTY_VALUE if there is no correct data. Create Upper