In the futures market, at the end of each trading day, the margin account is adjusted to reflect the investor’s gain or loss depending upon the futures closing price. This is called Marking-to-market.
If you must play, decide upon three things at the start: the rules of the game,
the stakes, and quitting time
The last price paid for a futures contract on any trading day. Settlement prices are used to determine open trade equity, margin calls and invoice prices for deliveries. Also referred to as Closing Price.