I would feed him some LC/MC food (not a lot of MC, about 2 tsps or so), if you haven't already, just to get him surfing in a bit higher numbers through the cycle. See where he is in the next 30 to hour, and feed again, if the numbers are not a bit higher. Food is the tool that we use to manipulate low numbers.
It looks to me like Indy is doing a lot of bouncing. This happens early on when they start treatment, and then some cats will slowly begin to settle into lower numbers (remember: that is the goal, so don't be too afraid of those greens). Take a look at Jude's spreadsheet from when he came out of remission last year until earlier this year. He did a lot of bouncing, but we finally settled on a dose that brought him into the greens (and we had to do some adjusting because he started racing down the dosing ladder). It just takes some time, and as they get into the greens, they will bounce because they are not used to those numbers.
Today is a likely what we call a bounce-breaking cycle: notice how he climbed last night and then started to drop all the way up until the a.m. preshot. Bounce-breaking cycles can carry extra momentum when the break is combined with the insulin.
Certainly check with your vet on dosing advice, but just know that if you were following SLGS, you would take a dose reduction for a drop below 90. If you follow TR, the dose reduction number for newly diagnosed diabetics is a drop below 50.
Also, I've seen some people here shoot different dose amounts in the am/pm, but I know the general advice among those who are experienced is that this can also lead to further bouncing. It's worth asking about or at least doing a site search to read about.