One of the key signs to any autopen signature are VISABLE DOTS at the end when the pen stops and lifts off the paper then starts to sign again!
If you do some very simple google research about autopens, you will learn and see examples for yourself.
Think what you want... but that is AP! Sorry!
Here is what to look for....
• Does the signature have perfectly even ink flow throughout?
• Does the autograph look a little shaky?
• Are any dots (ie. lower case letters or periods) the exact same size or thickness?
• Do the curved letters look scratchy?
• Is there a little ink dots at the beginning or end of the autograph?
• Are there any odd squiggly lines in the autograph that seem un-natural?
• Does the signature have the same thickness throughout the autograph, without variable pressure strokes?
• When compaired to other similar autographs, is the spacing, height of letters, length of signature the same every time?
• How popular is the person and whether they're likely to own an autopen machine?
Of those 9 criteria... your graph meets 6 of them.