Is "technically" losing money anything like "technically" making it?
Beats me.

What I was getting at was... As a trader, I use a screwy accounting system that assumes I will break even on a trade. If I buy a note at -20% which is current (and I plan to turn around and sell it soon), that doesn't mean it's worth full price so I don't post a gain then. That would be silly. Whereas LC's system does assume full value. On the flip side I don't realize any potential losses either until it's sold. Since I don't buy lates, sit on them, and pray for payments, this works out fine.
All good so far. But...
Of course I do also hold some SarahV-type notes for the long term benefit. Those are treated as par value but it requires me setting a checkbox for each of these that I plan to keep. If I don't set that checkbox, the bot assumes only break-even and interest payments coming in just decrease the breakeven price and do not add account value.
Long story short (too late?) if I'm too busy for months at a time to babysit my stuff, my system shows losses even if they aren't necessarily "real".
I do not know of any better way to handle it for an active trader. I don't like the idea of giving a note a fairy tale value based on (possibly flawed) assumptions and/or having wild fluctuations each month just because x,y,z changed in a group of notes, or if I refined my formula. Predictions are fine for trying to make a good purchase but I'm not going to show an actual profit based on them until I have the cash in hand.