I found this to be a particularl y efficient baf where you have all green on 2 PLAYER event and want to level the green when in your favour.
It will only level when in your favour when majority Green is on Fav and its also drifting beyond 1.49 Or when FAV has 0 Green.
It also stops greening when level or within 0.01 of level.
Sometimes Greening goes amiss when prices move as the green all is placed and you have a red/green and an unmatched bet.The last part
rectifies this and cancels the unmatched also.
A negative issue with greening is that sometimes it is prone to double bets but curiously this more often than not will work in your favour.

Enjoy