I would venture that significant support would occur around 875.40 based on the chart below, where this price level has provided a significant amount of S/R since late OCT 2008.
In fact, if you consider major pivots with a Fibonacci overlay, you will notice a near-perfect synchrony of pivots with significant Fibonacci levels in the following dates:
Significant Fib Validation Events 1 - NOV 08 = 61.8% 2 - JAN 09 = 50% 3 - JAN 09 = 38.2% 4 - FEB 09 = 38.2% 5 - APR 09 = 38.2%
(Note also how many times the 38.2% got validated)
So, overall, multiple and technically significant Fibonacci validations at this 875.40 level increases the probability of clustered trading around 875.40's, IMHO.