To ride a trend up as a long term trend follower it's necessary to move the trailing stops only moderately up. Trying to take profits too quickly will kill you. The old adage that no one got ruined by taken profits is wrong. Of course it's not the profits directly which break your neck, buts it's the many small losses you can't pay for without some big gains. Sadly profit taking is the natural thing to do. Richard Dennis taught his turtles that inclinations that come naturally are almost always wrong.