Legs are not always independent
Same-game parlays can contain outcomes that move together. A quarterback passing-yard over and a receiver-yard over may both depend on the same pace, trailing game script, or defensive weakness.
Correlation can help or hurt, but it means multiplying independent probabilities is not a reliable mental shortcut.
Find the thin leg
A parlay can look polished because several legs have good supporting evidence. One weakly researched or badly priced leg can still dominate the failure risk.
HRDE's weakest-link approach is designed to surface that leg instead of averaging it away.
Use fewer assumptions
Every added leg introduces another assumption. If several legs rely on the same player, pitcher, team, or game environment, treat the ticket as more concentrated than the leg count suggests.
Research education only. This article is informational and does not provide gambling, financial, investment, or legal advice. Market prices and event information can change quickly.