Hello Andrew! I'm still on sim, but I've thought about that a lot, my answer might not be as important as other live members opinions, but I'm still willing to give it.
I treat sim as close as it's to live as possible, therefore, my daily goal is 200/300$. However, I'm not always sticking to that goal, sometimes it's more than that, like x2 or x3, sometimes it's just half of my daily goal. Let me explain how I treat my daily goal target and what I'm doing after that.
First of all, if the day was easy, and I hit my daily goal with a few trades, and I see a lot of opportunities, I won't quit the day, I've a rule I set for myself," If I hit my daily goal, I allow myself for 1 extra trade, if it's a loss, I quit with 260(my max loss per trade is 40$), if I win that extra 1 trade and I see opportunities, I give myself another extra trade, if I get stopped out I quit, if not I continue) and so on.
Secondly, if I started red, the market is choppy, and eventually I got out of that red status to green, or close to daily goal, I just quit before hitting my daily goal. I think a lot of people might agree that starting out bad and getting out of a red whole messes up the psycology, and one should be greateful he got out, so just quit the day there.
Finally, If the day is choppy, but I'm doing fine, and it's hard to trade, I'd trade until I either hit the goal, or until I start feeling that I'm starting to make stupid trades or broaking the rules and get out with less than the daily goal
Hopefully that's helpful! And I'll add more if I remember something!