The differences are huge. The motiviations behind each are entirely separate. They are used by different people for different things. A day trader, slogging it

The differences are huge. The motiviations behind each are entirely separate. They are used by different people for different things. A day trader, slogging it out in front of their computer every day is very different from a floor broker trying to execute customer orders. That is the fundamental difference we're talking about here. Unfortunately, any time the markets are mentioned in connection with algorithm people instantly think "high-frequency trading", and most often they are wrong.