Use 3337.25 as the swing point for the overnight. This is 38.2% from the 3421.75 high to the 3198.00 low. Holding this area should send them back up to new highs. If all they can get up to is 38.2% of today's break at 3366.00, it would be a negative sign. Failing to hold 3337.25 should send them down to the 3266.00 major Gann square.