On Monday morning, I lazily checked my phone during the morning Zoom meeting at work and noticed a Yahoo finance alert that a stock on my watchlist was down a few percent. I thought about it for a few seconds and decided to pull the trigger. I nonchalantly opened my brokerage app and logged in while still pretending to pay attention to the meeting, then entered a hasty limit buy order. I don't even remember the limit price I used. It fill...