3 Timings you MUST be aware of if you trade indices:
-8:30am
-9:30am
-10:00am
If 8:30 manipulates, 9:30 expands
If 8:30 doesn't manipulate, 9:30 manipulates then expands
If 9:30 doesn't manipulate, wait for 10am 4H PO3
10am can sometimes form a reversal of the 9:30 expansion