Three wins out of four sounds great. Whether your betting win rate means anything depends on the prices you paid. You will learn to treat metrics as denominators first: win percentage over graded decisions, ROI as net profit over everything staked, and units as profit in the recorded stake size. A worked example compares three wins at -200 with three wins at -400. Both records are 75 percent, yet one finishes ahead and the other behind. You will practice grading picks at the odds actually published, handling pushes, and auditing a record for hidden exclusions. Closing line value shows up as context, never as a stand-in for real returns.
Learning objectives
- Distinguish observed public content from independently verifiable records.
- Reconstruct calculations and identify common data-quality traps.
- Apply procedures to paper-only examples and document uncertainty.
