Letting Artificial Intelligence Control Your Investment Portfolio

Perhaps you’ve been in line at the market, and you choose the line to pay that is the shortest. But you realize that the other line is moving much faster. So you switch lines, hoping to save some time. Suddenly the customer at the front of your line gets into a fight with the cashier.
You switch back, but now you’re two people further back in the line you originally started with. How in the world is it possible to pick the winner?