The nearest resistance is at $6600, that is 38.2% Fibs. After rejecting the support, BTC is expected to correct upwards towards that level. But if the support will be broken, next downside target will become $6200 or even $6000 areas.
It is now very unclear as to how BTC will behave in the following week, or two. But the breakout of either $6840 high (resistance) or $6000 support would certainly help to determine next strong move. All-in-all, the buying opportunity is there as long as the 6k support holds.