I'll tell you one trade I missed...I had a buy for extra shares of AMZN at 2575, but when I got busy trading other stocks I cancelled it. Generally not a good idea to leave an order open when trading other stocks. Next thing you know I saw AMZN plummet to 2570. I scrambled to enter the buy but by the time I could even enter the trade it had already popped to 2589, and then shot almost straight to 2610.