TNA Daily Model: Prelim trade dates for last 6 months: Down 22 June 2010 Up 8 July D 9 August U 31 August D 18 October U 2 November D 11 November U 1 December . . .continuing Up today. Taking long (U) positions only (using daily closing prices) the gain is approximately 94%, using today's high for TNA. Consequently, why trade intraday?