Distance control is the key to determining break on the green.
For those of you who are interested, based on the formulas I read in the forums about putting, I created a simple excel putt distance calculator , which you may find useful. Meant as a general guide and still no substitution for "feel" or practice, it just may help with distance control, which in turn helps with reading / playing green breaks. Used with a program such as Always On Top the excel file can be set to 70%, "shrunk up" and be made to "float" on top and to one side of the WGT game window. Its a work in progress so it you have suggestions - feel free. Yes, I know that most of us can do this in our heads, but for those of us who choose to play in an altered state of consciousness, whatever that may be, it helps.
Green types are set once per round, then you just have to input distance and elevation.
The formula used is:
(Distance / Green Type) + or - elevation + 1 foot for every 10 (distance * 0.1) = Putt Distance
Example of a 13 foot putt, tournament greens, 1 foot down
(13/1.3) - 1 + 1.3 = Putt Distance
10 - 1 + 1.3 = Putt Distance
9 + 1.3 = Putt Distance
10.3 = Putt Distance
Green types are
c = champion = 1.6 (this may need tweaking)
t = tournament = 1.3
v = very fast = 1.2
f = fast = 1.1
st = standard = 1.0
s = slow = 0.9