this is the way wsex explains it:
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Conditional-Wager Rules ^list
There are two types of Conditional wagers: IF-THENs and ACTION-TOs.
IF-THEN and ACTION-TO wagers are made by combining two or three wagers, in order, so that each secondary wager is dependent on the success of the previous wager.
IF-THENs
If the first wager WINS, the following wager has action.
If the second wager WINS, the third wager has action.
If any wager in the IF-THEN bet loses or pushes, all of the subsequent wagers have no action.
ACTION-TOs
If the first wager WINS or PUSHES, the second wager has action.
If the second wager WINS or PUSHES, the third wager has action.
If any wager in the ACTION-TO bet loses, all of the subsequent wagers have no action.
For IF-THEN and ACTION-TO wagers, a player?s maximum possible loss will be calculated and restricted at the time of the wager. At the conclusion of all of the games in a conditional wager, or as soon as the balance of a wager has no action, cash will be unrestricted and accounts will be credited or debited accordingly.
If a game or proposition is not played on the date specified, or if there is a pitching change in the case of a baseball wager, a conditional wager has no action.
In addition to general limits on wagers, there is also a limitation when wager amounts are set for conditional wagers. The wager amount on the second or third bet of a conditional wager must not exceed the total bet and the 'to win' amount for other bets on the same game. For example, if your first bet is to lay $110 to win $100 on the OVER, you are limited to wagering $210 if your second or third bet is for the winner of the same game.
For totals propositions, all of the general rules apply in determining whether the proposition and subsequent propositions have action.
