The contract settles at the sum of five cards dealt without replacement from a 52-card deck (A=1, J=11, Q=12, K=13). Cards are revealed one by one. Before each reveal a bot quotes a market. You may buy or sell up to 2 lots per step, building a position.
Fair value at any moment is the revealed total plus the number of hidden cards times the average of the cards still left in the deck.