Is the market currently on autopilot?

In the past few trading days, does anyone else get the feeling computers are doing most of the trading? (i.e. automated orders, robotic investing, etc.) The US indices have been having a lot of 1 to 5 minute upswings especially when a MA ceiling is broken, followed by a few minutes of stability, then a sudden drop. I can't imagine human traders suddenly get very optimistic for a few minutes between CPI day and Fed day.