The Confidence of fill result indicates this area of the part may be difficult to fill with plastic. This is because the melt temperature at the point you selected is too low.
The Temperature at flow front result is one factor used to determine the Confidence of fill result. If the temperature in an area is too low, the Confidence of fill result will be yellow or red in that area.
If the Temperature at flow front result is too low in a thin area of the part, hesitation or short shot may occur.
If it is too low in an area where weld lines are present, the weld lines may appear worse, and may be structurally weaker.
There are a number of ways to improve the confidence of this area filling, and ensure part quality is acceptable.