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The Cold Line

The Cold Line© 2026 — THE NUMBER BEFORE THE NUMBER.

Sports betting analytics across live odds, stale-line detection, PLATE READ, NextDown, and long-form research for NFL, NBA, MLB, NHL, college sports, soccer, and the 2026 FIFA World Cup market.

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The Cold Line is an independent sports analytics and information service, not affiliated with, endorsed by, or sponsored by the NFL, NBA, MLB, NHL, NCAA, WNBA, MLS, FIFA, or any league, team, or governing body. All team and league names, logos, and marks are the property of their respective owners and are used for identification and editorial purposes only.

The Cold Line
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Betting Terms
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ROI (Return on Investment)

Strategy

ROI (Return on Investment)

What ROI (Return on Investment) means in sports betting — explained in plain English.

Definition

Your profit as a percentage of total amount wagered.

In plain English

How much profit you make compared to how much you bet. 5% ROI is excellent!

Related Strategy terms

Arbitrage / Arb
Chasing
CLV (Closing Line Value)
Contrarian
Expected Value (EV)
Handicapping
Line Shopping
Move Player

Browse the full A–Z betting glossary or read the complete betting guide. The Cold Line also publishes a free year-round sports calendar and live odds board — no signup required.