Three tipsters can publish the same outcome for the same fixture. That gives you three published opinions, but it does not automatically give you three independent pieces of evidence. They may share a news source, a market signal or closely related reasoning.
Define what counts as overlap
Record the fixture, market, line, time and stated rationale for each selection. Separate exact duplicates from related events. Home to win and Home −0.5 may have closely connected settlements under the same period, while a goals market answers a different question.
Different markets on one fixture can still be related. Do not describe them as independent merely because their labels differ. Without a suitable model or dataset, avoid inventing a correlation coefficient or a combined probability.
A simple exposure table makes duplication visible
The following is a fictional teaching example, not advice to place these stakes or an OptaTips record.
| Source | Fixture and selection | Hypothetical stake | Overlap note |
|---|---|---|---|
| A | Home win in Match X | 10 units | Same event as B |
| B | Home win in Match X | 10 units | Duplicates A’s event |
| C | Over 2.5 in Match X | 10 units | Different event, same fixture |
A and B together expose 20 units to the home-win event. Listing two names does not reduce that event’s losing consequence. C adds a different contract, but the table alone does not show whether it diversifies the risk.
Compare records separately before combining them
Keep each source’s publication times, quoted prices and settlements. Use a common period and disclosed calculation rules. A high percentage counted per Series cannot be directly compared with one counted per individual selection.
Show the aggregate separately from the individual records. Costs, missed selections and differences between quoted and available prices can change the reader’s after-cost result. Do not claim that a combined list would have produced an outcome without identifying which entries were included.
Look for distinct information, not just distinct branding
Ask what each source adds that you can inspect: a different competition specialty, confirmed team information, a disclosed method or a different question about the fixture. A claim of originality is not proof; evaluate the public reasoning and its timing.
If all sources refer to the same announcement, the number of endorsements does not turn that announcement into multiple independent confirmations. Preserve the original source rather than treating repeated summaries as separate evidence.
Use an observation period with a defined scope
Decide in advance which sources, markets and dates your review covers. Record failures as well as successes. A short observation period can help test your recording process without certifying anyone’s long-term skill.
The record-comparison guide explains consistent return calculations. The selection checklist covers completeness and publication evidence. Browse tipster profiles with those questions in mind rather than assuming that a longer follow list is better.
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