The Massachusetts Association of Realtors will hold its annual conference and trade show on Oct. 10 and 11 at the Westin Boson Waterfront Hotel in Boston. The two-day conference will feature more than 20 educational sessions for real estate professionals. The conference, showcasing 50 booths of product and service providers, opens at 8 a.m. on both days. The association’s professional awards dinner is slated for Oct. 9 from 6 to 9 p.m. MAR is the state’s large trade association of real estate agents.