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If it is a flat I wouldn't expect the price to drop much more than around 713. A flat correction doesn't have enough downward pressure to go much further below the previous A wave. I also noticed a flat subwave so it could be a fractal of the outer pattern.

Well, best to keep a close eye to the c wave! I am sure it will go below 600 in relation to the extended fifth wave...

That would be fantastic ;)