[Gretl-users] intraday stock prices

Hi, do you know a site where you can free download high frequency financial data (like  5-minute price)? I need it to calculate the daily realized volatility, to be used to evaluate the goodness of a stochastic volatility model. Thank you, Paolo -- Paolo Chirico RU e Prof.Agg. di Statistica Economica Università del Piemonte Orientale Dip. di Giurisprudenza e Scienze Politiche, Economiche e Sociali (DIGSPES) Alessandria, Italia