Why only consider the SUPPORT 1 = $ 64xx, there are support line before it?
The Fibo certainly works differently to the forex platform fibo so I'm not sure how the trading fibo tool to be accurate at pointing out which supports are stronger. But to me $73xx and $69xx are considered to be support already as we break it. That means the battle again will continue when prices dips that level.
From the fact that the price has been rejected from moving under around 7.1k I would say we have quite strong support at around 7k to 7.2k region and massive resistance at 7.5k which we cannot break decisively for quite a while now. Besides that I'm pretty sure you meant $73xx resistance not support as the price constantly gets rejected from it.
If we manage to break the 7.3k resistance and then the overwhelming resistance at 7.8k I would take that as a sign of confirmation that we're in a bull market and long the corn.