This is solely a prediction based on technical build up seen similar to the price action in 11 June - 16 July of 2017. That was a 39% correction but I don't believe we will see such big retracements in this bull run unless a huge fundamental bearish news is received. During this time will come with mixed price action for different alt coins. Some will follow Bitcoin and some that are at the verge of breaking will be moving on its own.