How many minimed pump users that use the enlite sensor with the 630g pump constantly get arrows after eating. One arrow indicates that the sugar is rising more than 1 millimole in twenty minutes. I always get one or two arrows after eating.
Well, your blood sugar DOES rise after eating…
You might try prebolusing at least 15 minutes before a meal if your BG is not low.
I have to be careful because I am prone to lows.
It does take some tweaking to find YOUR perfect pre-bolus time. Keeping in mind, that can change based on the meal youre eating, the phase of the moon, and the alignment of the stars 
Also, while searching for pre-bolus nirvana, please keep in mind even a non-D person’s BG rises after eating. It almost never will be flat.