A chart needs a question and a defined population
Choose the comparison before choosing the graphic. Show units, sample size and the reporting window. A smooth line can conceal missing meetings or a changed selection rule. When plotting percentages, expose the denominator and consider uncertainty. Presentation should make the limits easier to see rather than make a weak claim feel authoritative.
Three checks worth keeping
- Label the metric, unit and time window.
- Show missing observations instead of connecting through them silently.
- Keep sample sizes beside percentage comparisons.
Put the question to work
Visual precision should follow the evidence available, not the number of pixels on the page.
Use the strike rate & uncertainty to organise the next step, then explore the worked example.
No chart is based on a real tipster record or live racing feed.
Continue your racing research
For a related racing resource, explore PTPTips horse racing ratings and form. Check the source for changing race information.
Terms used in this guide
- Schema
- A documented structure and field contract for a data object.
- Stable identifier
- An identity key intended to remain reliable across labels and updates.
- Snapshot
- A representation of the full relevant state at a particular point.
- Partial update
- A change representation whose omitted-field meaning must be defined.
- Freshness
- The age and update context of a particular field, distinct from network speed.
- Provenance
- Information about the origin and transformation history of a data value.
Related reading in the network
- horse racing APIs — Plan the data contract, integration and operational checks behind a horse racing API project.
- horse racing data providers — Prepare a horse racing data requirement that a B2B provider can scope and demonstrate.
- horse racing database identifiers — Build race records that survive name changes, duplicate names and corrected meetings.