Samsung Electro-Mechanics' upper wick is way too long

Honestly, Samsung Electro-Mechanics hitting near 190k today only to close in the mid-160k range leaves a really bothering upper wick.

Those who eagerly chased it in the morning must have felt pretty conflicted looking at the closing price.

On days like this, I'd rather wait a few more days instead of buying more right away. If it holds without breaking the low-160k range, it won't be too late to reconsider then.