string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\Ninjatrader 7\db";

            const string dbName = "NinjaTrader.sdf";

            SqlCeConnection c;

            c = new SqlCeConnection("DataSource=" + path + @"\" + dbName + ";File Mode=Read Only;Temp Path=" + path);

            c.Open();



            string query = "select a.marketposition,a.quantity,a.price,b.expiry,c.name,a.executiontime,d.name,a.pos,a.counterid" +

                " from nt_execution a,nt_instrument b,nt_masterinstrument c,nt_account d" +

                " where a.instrument=b.id and b.masterinstrument=c.id and a.account=d.id" +

                " order by a.executiontime";



            SqlCeCommand cmdGet = new SqlCeCommand(query, c);

            SqlCeDataReader reader;



            reader = cmdGet.ExecuteReader();



            while (reader.Read())

            {

                int m = (int)reader[0]; // L ou S

....