My guess is that the algorithm doesn&#x27;t expect to make money out of that particular order, but rather guesses this is a bigger order that is being split (laddered if you will) into multiple small orders at different acceptable limits. The product I used (Interactive Brokers interface) offers that laddering strategy as an option when trying to make big purchases.<p>Oh, and BTW, order cancellations cost money. Cents, sure, but when you are making money on a 1c spread, you would also benefit from a 1c cancellation.<p>Other than that, I&#x27;ve been tempted (and many times succumbed) to raise the limit just to get that trade. And then you see the price go up again before your order goes through. It&#x27;d be hilarious if it wasn&#x27;t infuriating.