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Sports Betting 101 - Your guide to better betting

 

 

SPORTS BETTING 101:

YOUR GUIDE TO BETTER BETTING

Whether you're new to PROLINE or just want a refresher, this guide breaks down the fundamentals of sports betting so you can place bets with confidence. We’ll explain how odds work, walk through popular bet types, and show you how to read the sportsbook like a pro.

HOW TO READ ODDS

DECIMAL ODDS

Decimal odds show you the total payout you’ll receive for every $1 wagered, including both your profit and your original stake. They’re simple:

Payout = Wager × Decimal Odds

Higher numbers indicate a less likely outcome, while lower numbers suggest a favourite, and the bet on that outcome will payout less. 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.

Examples:

  • 1.57 — For every $1 you bet, you’d receive $1.57 total if the bet wins.
    • A $100 wager would return $157 total (your $100 stake + $57 profit).


  • 2.30 — For every $1 you bet, you’d receive $2.30 total if the bet wins.
    • A $100 wager would return $230 total (your $100 stake + $130 profit).

Decimal odds make it easy to compare potential payouts at a glance.

Remember: Decimal odds are different from the point spread.


  • The spread is shown as a single or double-digit number paired with a plus or minus sign (e.g., +3.5 or –3.5). The +/- is the key differentiator that indicates which team is favoured or the underdog.

AMERICAN ODDS

American odds use + and – symbols to show both the potential payout and the implied likelihood of an outcome. Unlike decimal odds, which express total return per $1 staked, American odds are based around a $100 reference amount.

Negative numbers (–) indicate the favourite. They show how much you’d need to wager to win $100 in profit.

Positive numbers (+) in American odds reflect the underdog and indicate how much of a payout you’ll profit if you bet $100. With +230 odds, a winning $100 bet on Detroit earns $330 (including the original bet).

American odds are especially useful for seeing which side is favoured at a glance. Negative numbers are more likely outcomes, while positive numbers represent longer shots.


Quick Tip:

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).

For more about odds, click here.

Examples:

  • –200: You must bet $200 to win $100 in profit.
    (Your total return would be $300: your stake plus your winnings.)


  • +160: A $100 wager would win $160 in profit.
    (Your total return would be $260.)

 

MARKETS

POINT SPREAD

A spread bet is a wager on a team’s margin of victory or defeat.

  • The favourite is marked with a – and must win by more than the listed number.
  • The underdog is marked with a + and must win outright or lose by fewer points than the number shown.

FYI: Half-point spreads (like -3.5) are used to prevent pushes. If you take Toronto –4 and they win by exactly 4, the bet is considered a push, and your wager will be returned.

For more about Point Spreads, click here.

Examples:

Let’s say the Toronto Argonauts –3.5 are playing the Calgary Stampeders +3.5.

  • If you take Toronto –3.5, they must win by more than 3.5.
  • If you take Calgary 3.5, they can win outright or lose by fewer than 3.5 points.

MONEYLINE

A moneyline bet is simply a wager on who will win the game.

For more information about Moneylines, click here.

Examples:

The Vancouver Canucks are 2.30 to beat the Ottawa Senators, who are 1.50.

  • If you bet $100 on the Canucks 2.30, you would win $230.
  • If you bet $100 on the Senators 1.50, you would win $150.

OVER/UNDER (TOTALS)

A totals bet focuses on the combined number of points/goals/runs scored in a game—no need to pick a winner.

If the number is a whole number and the final combined score lands exactly on it, the bet is a push and your wager is returned.

Examples:

The over/under total for Hamilton vs Winnipeg is 46.5 points.

  • Bet the Over if you think the teams will combine for 47 or more.
  • Bet the Under if you think they’ll total 46 or fewer.

PROPS (PROPOSITIONS)

Props are bets on outcomes other than who wins the game.


Player Props
These relate to a single player’s performance.


Game Props
These relate to other in-game events or milestones.


Player Props Examples:

“Scottie Barnes Over 19.5 points” — you're betting on him scoring 20+.


Game Props Examples:

  • Will the game go to overtime?
  • First team to score?
  • Home team to score in both halves?

PARLAYS

A parlay bundles two or more bets into one ticket. All selections (called “legs”) must win for the parlay to cash.

If all three hit, you win at boosted odds. If one misses, the entire parlay loses.

Parlay odds are calculated by multiplying the odds of each pick in your parlay. Just convert each selection to decimal odds, multiply them together, and you’ll get your total parlay odds.

FYI: If one leg ends in a push, it’s removed and the odds adjust.

Examples:

You combine these spreads into a parlay:

  • Philadelphia 76ers spread
  • Toronto Raptors spread
  • Memphis Grizzlies spread

A parlay with picks at +200 (3.00), +150 (2.50), and +100 (2.00) gives you 15.00 when multiplied. A $100 bet at 15.00 would return $1,500.

SAME GAME PARLAY

A Same Game Parlay combines multiple selections from the same matchup.

Examples:

For a Maple Leafs game, you might combine:

  • Maple Leafs to win
  • Total goals over 6.5

Both legs must win for the parlay to cash.

LIVE (IN-GAME) BETTING

Missed the opening whistle? No problem. Live bets allow you to wager during the game as it unfolds. Odds update in real time based on gameplay.

Keep in mind:

  • Odds are subject to change.
  • Settlements for some live markets occur only after the game ends.

ALTERNATE LINES

Alternate lines let you adjust to a different spread or total.

For example, instead of Leafs -1.5, you might pick Leafs -2.5 for a bigger potential payout or Leafs +1.5 for a safer, lower-payout option.

FUTURES

Futures are bets on events that will be decided later—weeks or even months from now.

Examples:

  • Edmonton Oilers to win the Stanley Cup
  • Toronto Raptors to win the Atlantic Division
  • Regular season win totals (e.g., Calgary Flames O/U 91.5 wins)
  • Player season-long stat props (e.g., Josh Allen Over/Under 34.5 passing TDs)

SYSTEM BETS

System bets let you place multiple parlay combinations at once. You don’t need to win every parlay to return a profit.

Once you add 3 or more selections to your betslip, you’ll see options like By 2’s, By 3’s, and so on, each representing the number of legs per individual parlay.

System bets can include up to 24 legs, generating dozens of combinations.

To learn more about System Bets, click here.

Examples:

You pick three teams to win: Team A, Team B, Team C.

You now have:

  • By 2’s: A+B, B+C, A+C
  • By 3’s: A+B+C

If you place $30 on By 2’s, it’s split evenly: $10 on each 2-team parlay.

Note: You can’t combine sides, totals, or props from the same game into a system bet.

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