MQL5 ReferenceStandard LibraryGeneric Data CollectionsCHashSet<T>Contains AddCountContainsComparerTrimExcessCopyToClearRemoveExceptWithIntersectWithSymmetricExceptWithUnionWithIsProperSubsetOfIsProperSupersetOfIsSubsetOfIsSupersetOfOverlapsSetEquals Contains Determines whether a set contains an element with the specified value. bool Contains( T item // the search value ); Parameters item [in] The searched value. Return Value Returns true if an element with the specified value is found in the set, or false otherwise. Count Comparer