Please let me know who they are so I can contact them.
To be cheeky, you can perhaps contact some of them on almost any major institutional trading floor.

To be more serious for a moment (which does occasionally happen), there are certainly some traders in some institutions who are more or less expected, other things being equal, roughly to double their account-size over a 12-month period, and that does equate to an average of about 6.5% monthly, compounded monthly, so it's kind of a "known figure".
What I think the OP may not quite be taking into account is that those few who can achieve this steadily are among the world's top professional traders, are paid millions, have had really extensive formal education, and many thousands of hours of targeted, supervised screen-time practice, and have a risk manager breathing down their necks, and so on and so forth. Which is why I was asking him about his own skill-set and experience-level (admittedly with the strong suspicion that - albeit doubtless through no fault of his own - it may not quite be one commensurate with that kind of ball-game). I'm "just saying" ...