You have to see this wick as a negotiation between buyers and sellers that are coming to each other more and more untill they finaly "meet" at the end of the wick.
In a bull market (up-market) it is most likely a coin will go up rapidly after that.
In a bear market like we're in now it is most likely a coin will drop rapidly after that.

At this moment I would not invest or have any coin in my portofolio now. There are to much rumours going around that BTC is gonna go to $ 5.000,-- and even lower. Bitcoin is gonna drag all coins with him if that happens!