Super Micro Computer, Inc. (SMCI) is trading lower Tuesday, but there's a decent chance the recent selloff might be running out of steam. The stock has dropped back to a price level with an interesting history of holding firm.

Super Micro is our Stock of the Day because shares have repeatedly found their footing around this zone—and that pattern could play out again.

Back in January, the stock trended lower until it hit around $27.75. At that point, the selling pressure evaporated and Super Micro started climbing higher.

Here's the thing about support levels: they work partly because of anxious buyers who hate missing out. These traders know that shares go to whoever pays the highest price, so they start bumping up their bids. Other nervous buyers see this happening and follow suit. Before you know it, you've got a bidding war that can push the stock into an uptrend.

In April and May, Super Micro fell back to that same $27.75 level. Both times, it found support again.

Why do old support levels tend to work again? Enter the remorseful sellers—traders who regret dumping shares at support when the stock rallied afterward. When the price falls back to where they sold, they place buy orders hoping for redemption. Enough of these orders can recreate the same support floor.

Now Super Micro has returned to this critical level once more. If there's a crowd of remorseful sellers ready to buy, combined with impatient traders afraid of missing the next move, we could see support hold and an uptrend develop.