There's a whole slew of strategies used by these people. There are a lot of strategies used just to find out what other strategies are being used. People are

There's a whole slew of strategies used by these people. There are a lot of strategies used just to find out what other strategies are being used. People are paid big bucks to develop new strategies that hide what the trader's intentions are. This is a very difficult thing to do, and that is why the salaries are so large.