Weekend fixture: both teams score?
How it resolves
Both sides need at least one goal in normal time for this to settle Yes, and extra time or penalties don’t count towards it.
What we'd look at
We'd start from each side's scoring record at home and away rather than the league table. Two attacking teams with leaky defences push this up, and a cagey derby or a big favourite at home can pull it down by quite a bit (we've seen it drop under 50% for exactly that reason).
About practice markets
The price here is simulated, which means nobody's on the other side and nothing you do will move it. We built it that way on purpose, because the habit we want you to pick up is checking a price against your own number before you trade, and that's far easier to practise when a mistake costs you nothing. Try putting in a probability that's a few points away from the price and watch what happens to the expected value and the Kelly stake (that's the whole course in miniature).