Editing Signal (bridge) (section)

===Odd–even (Roman)===
With this agreement, the first discard shows the following: if it is an odd spot card (three, five, seven or nine) it is encouraging in that suit; if it is a low even spot card (deuce or four), it shows preference for the lower ranking suit of the other two suits; if it is a high even spot card (six or eight), it shows preference for the higher ranking suit. The even card often has a dual function: aside from indicating suit preference, it is also a negative indication for the suit being used for the even card. A high odd card followed by a low odd card may show both preference and count (odd or even number of cards, depending on partnership agreement).