MQL5 ReferenceStandard LibraryGeneric Data CollectionsIMap<TKey,TValue>Add AddContainsRemoveTryGetValueTrySetValueCopyTo Add Adds a key/value pair to a collection. bool Add( TKey key, // key TValue value // value ); Parameters key [in] Key. value [in] Value. Return Value Returns true on successful, or false otherwise. IMap<TKey,TValue> Contains