The First thing I do is to look at the putt in reverse View..... This will give you a better idea of what the dots are doing. It can also give you a totally different dot movement too.
In Reverse View... If there is a grid line that goes straight from you to the hole.... the ball will sit on one side of that line...... follow the dots on the side the ball is sitting on.
Sometimes you might see the dots going in different speeds either side of the line...
One side of line is slow, the other fast, use the line the ball is sitting on.
If you see the dots moving towards each other to the grid line... then it's a straight putt, but be careful... there could be one square that the dot could move in one direction.
Change back to normal view and Putt, if you're a miss the ding putter.
When in Doubt.... Just hit it straight.... If there is a snake.... hit it straight, but as previously said... note down what it does for next time.
If you on an angle in reverse View.... then it's just close your eyes and hit for me....lol, well not that bad.
Of course.... on some holes, those theories get thrown out the door.... then is just experience that gets you through it.... some times....lol