The toll is read from the temperature at the moment your trade confirms. Sells inside three days of a buy carry the cooling rate: +15% under 24h, +8% on day 2, +3% on day 3, then nothing.

Enrolled tokens earn a share of every toll. Leaving inside seven days pays a penalty that starts at 10% and cools to zero, and it goes to the citizens who stayed, not to the protocol.