the only consistent trade is to buy 2 hours b4 the close when the intra-day chart looks its absolute worst
then the huge funds step in and the market almost always goes green till the final 20 minutes where it will either:
1. Surge 200 points till 4:04 (including virtual points)
2. drop 200 points
The volume is so high that its like a compressed spring. The slightest perpetuation of a fund transaction can trigger panic buying/selling and a 2% move in either direction