Utter ignorance

I accidentally bought back my apple shares after selling them because I placed a limit order to buy at particular price. Well, a limit is a limit. It's a boundary. It means that if the market price matches is better than the limit you set, it'll execute. What I wanted to do, was to wait til the market value reached a certain level before buying back. I should've placed a stop limit/market order.

It's an utterly embarrassing way to lose 3 x 11.99 dollars.