MQL5 ReferenceStandard LibraryGeneric Data CollectionsIList<T>IndexOf TryGetValueTrySetValueInsertIndexOfLastIndexOfRemoveAt IndexOf Searches for the first occurrence of a value in a list. int IndexOf( T item // the search value ); Parameters item [in] The searched value. Return Value Returns the index of the first found element. If the value is not found, returns -1. Insert LastIndexOf