In the recent rounds I've played i noticed an increase of my DMG and the HSKR with my favorite sniper they are now in orange is there anyway to lower them like just shoot on the go because i don't understand and try to keep all of my stats in green.

Orange color shows how much your stat is above average. It doesn't necessarily mean you are cheating. Don't worry about it.

Thank you and green does it mean normal or average?

Green and white is fine tho, like Rio said, don't worry about it and if you reach at some day red, just proof that you are clean, if you are, shouldn't be a big deal.