When the Show dealer probabilities option is
selected in the Game tab of the Preferences
dialog, the exact expected values (in percent of initial bet) of each available player
option are displayed over the table surface, to the left of the dealer's hand.  These
values take into account all cards in your current hand and the dealer's face up card.
For example, suppose the number displayed for standing is -12.345.  This means that
if you played out the current situation many, many times, standing each time, with a 1.00
initial wager, then on average you would lose 0.12345.
