Currently price retraced back to 50% and the upper of the extended . It is also very close to the 200 Moving Average, thus the area between 3-4k satoshis should be treated as a massive support for Synereo.
While the uptrend is expected to continue, the next resistance is at 6k satoshis, which is 38.2% level applied to the breakout point. Second resistance is at 6.6k and Final upside target for the wave up could be as high as 8k satoshis.
On a downside, price could still consolidate for a little longer and even go back to 3k satoshis area. However, this is likely the worst case scenario for Synereo as the bull seem to dominate currently.