Smart rebound from 6780 (July 27 high) in early Europe and a subsequent failure at 10-DMA and a fall back below 6780 amid bearish break in RSI suggests the index is likely to target 6680 (23.6% of Brexit day low – Aug 15 high). A violation there would expose 6615.8 (Aug 4 low).
On the higher side, only day end close back above 6780 would signal bearish invalidation.