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PROLINE+ odds are set using algorithms that are based on a range of factors including in-game activity and overall betting action, and they’re monitored by a team of sports analysts. You bet with, or against those odds. Whether it’s who will win, or if a player scores a touchdown, you’re choosing one of two or more options. Each option has assigned odds reflecting the likelihood of that result occuring, which are used to calculate the potential payout, when multiplied with your wager amount. If the odds show something is less likely to take place, the potential payout on that bet will be higher—the greater the risk, the higher the potential reward. If a team is the favourite to win, or some other outcome is more likely to occur, a bet on that outcome will pay out less.

Betting with the expectation of winning can lead to chasing a loss. Play to add some fun to your favourite games, but always keep your budget in mind.



If you’re registered for PROLINE+, keep an eye on your budget with a Sports Spend Limit in your My PlaySmart Tools.


Every betting choice on PROLINE+ has odds associated with it. This tells you which bet is more likely to win, and what the payout could be if it does. Let’s look at the different odds formats and how they work. You can toggle between formats in your PROLINE+ settings.


A decimal figure like 1.35 or 3.3 on a betting line means you’re dealing with decimal odds. These are relatively easy to calculate. The amount in the decimal figure indicates your potential payout and whether you’re betting on the favourite or underdog.

  • Payouts are calculated by multiplying your wager amount with the decimal odds. E.g. A winning $10 bet with 2.0 odds pays $20 (including the original bet).
  • The higher number is the underdog, or the less likely outcome. Since it’s less likely to occur, the payout is greater if it does. A riskier bet with a higher potential reward.
  • The lower number is the favourite, or more likely outcome. Since it’s expected, the payout is less.

Here’s an example, using a simple Moneyline bet (a bet on who will win):


Detroit is the underdog against the favourite Buffalo. A $10 Moneyline bet looks like this:

  • Detroit: with 3.3 odds, a winning $10 bet returns $33 (3.3 x 10 = 33.00, including the original bet)
  • Buffalo: with 1.35 odds, a winning $10 bet returns 13.50 (1.35 x 10 = 13.50, including the original bet)


A figure like +230 or -280 on a betting line means you’re dealing with American odds. The pluses (+) and minuses (–) indicate potential payout and whether the bet is on the favourite or underdog. Here’s the same example, but with American odds:


  • Positive numbers in American odds reflect the underdog, and indicate how much of a payout you’ll profit if you bet $10. With +230 odds, a winning $10 bet on Detroit earns $33 (including the original bet).
  • Negative numbers show the favourite, and indicate how much you’d need to bet to win $10. With -280 odds, a winning $10 bet on Buffalo earns $38 (including the original bet).

In some cases, both bets in American Odds will be negative (-). If so, the option with the number farther from zero is regarded as the favourite (e.g. -150 would be the favourite over -120). There are also instances where all the bet options could be positive (+). If that’s the case, the selection with the lowest number would be the favourite (e.g. +120 would the favourite over +150).


A figure like 1/2 or 23/20 on a betting line means you’re dealing with fractional odds—most commonly used in the UK, often for horse racing. Here’s the same example, but with fractional odds:


The number to the left of the slash is how many times the outcome is expected to fail. The number on the right shows how many times the outcome is expected to succeed. The underdog typically has a higher number on the left, the favourite a higher number on the right.

  • Detroit is the underdog at 23/10. If the game was played 33 times (23+10), Detroit would lose 23 and win 10.
  • Buffalo is the favourite at 7/20. If the game was played 27 times (7+20), Buffalo would lose 7 and win 20.

To calculate potential winnings, multiply your wager by the quotient, or the result of dividing the fraction. The payout on a winning $10 on Detroit is calculated by dividing their odds (23 ÷ 10 = 2.30) multiplied by your wager: (10 x 2.30 = $23). The initial bet is returned to the player as well for a total payout of $33.


PROLINE+ features pre-match and live in-game betting. Since sports are unpredictable and anything can happen during a game, the live betting odds may change as a result. These are known as dynamic odds. For example, if a team’s star player is injured during a game, the odds of that team winning may go down. While the odds of any outcome occurring may change prior to or during a game, once you’ve placed your bet you’re locked into those odds and payout rate.

If a player feels like a bet they’ve already placed is unlikely to win they can select ‘Cash Out’ for a chance at a reduced payout, or to get part of their wager back.


A laptop screen displays the PROLINE+ logo

PROLINE+ odds are set using algorithms that are based on a range of factors including in-game activity and overall betting action, and they’re monitored by a team of sports analysts. The odds can be affected by in-game, environmental and external factors as well as the level of betting activity on the particular game or market. No matter the odds, there are no guaranteed outcomes when it comes to sports gambling. Anything can happen.


It is possible to increase your odds of winning by increasing the number of betting combinations you play, to cover all possibilities.

While this may seem like a good strategy, the costs of additional bets will be subtracted from any potential winnings, which are not guaranteed; a factor that could put you over your play budget.


A laptop is shown versus a store, signifying a comparison between online and retail sports betting.

PRO•LINE at retail and PROLINE+ are two separate and distinct games, each with different odds, limits and methods of play. The retail PRO•LINE odds are set by considering a variety of factors and industry odds available at the time the event list is created. OLG is not able to change the odds for retail PRO•LINE events once they’ve been published.

PROLINE+ on the other hand features dynamic odds, which means they can be updated as required to reflect changing circumstances and betting activity on a game, event or market. Dynamic odds are a standard feature of online sportsbooks and allow flexibility to manage the game while allowing players to continue to bet on their selections