Well, it’s still a bit of a mystery to me, too, so I don’t want to sound like I know more than I do. I think it is kind of similar but I don’t think there’s any direct way to convert one to the other. In Manual I had evolved a pretty aggressive basal rate from 3am-10:30am because of DP. My first tweak to CR in auto mode was to see what would happen if I took my CR way down at that time. It seems to have helped, but it’s a gradual kind of thing. The algorithm doesn’t immediately take account of those changes but integrates them with other factors. I’ve read that there’s a 6-day cycle for this stuff as well. It all makes it kind of hard to tell what is the effect of a given change.
Most frustrating thing to me now is that my fasting SBGs are great, but while the sensor is impressively accurate most of the time, it just doesn’t want pick up on the DP trend. At 6 a.m. today SBG was 119–yay!–but my finger stick was 158. Boo. I actually had gotten up at 4am and did a finger stick then, and both SBG and meter BG were ~110. So somewhere in there my DP took off and the sensor lagged too far behind to rein it in. There’s nothing I can do to force the sensor to be more responsive, and the pump can’t react to what it doesn’t see no matter what my settings are. So it may be my only option is to take it out of Auto overnight—I’ve read of other people doing that—though it bugs the part of me that wants to make the thing work the way it’s supposed to.