You do not understand me. Reactions to an order make sense. But if I click "Buy", and before the order hits the book, the software vendor that is processing my

You do not understand me. Reactions to an order make sense. But if I click "Buy", and before the order hits the book, the software vendor that is processing my order notifies a market maker to increase their price in order to make me pay slightly more, this would be unfair ("front running").