The average person can enter a stock trade on their computer, hit refresh, and the trade is done. As fast as that seems, there are professional traders moving even faster, executing thousands of trades per second. Over the years, the need for speed got so intense that competing firms would aim to get their own systems closer and closer to the exchange’s computers, so as to minimize the length of the wires and get their trades in even faster. How did this happen? And how does this change the natu