Run Charts in Cricket Analytics Explained
What run charts are in cricket, how they differ from worm charts, and how they track ball-by-ball scoring progress during an innings.
What Is a Run Chart?
A run chart (or innings scoring chart) in cricket plots the total runs scored on a ball-by-ball or over-by-over basis throughout a single innings. Unlike a worm chart (which overlays both innings), a run chart focuses on one team's innings in isolation, showing the scoring rate at each point and marking wickets as vertical lines where the fall of wicket occurred.
How It Differs from a Worm Chart
A worm chart is a comparison tool — it shows both teams' scoring progression overlaid on the same graph, making it easy to see if the chasing team is ahead or behind the target at any given point. A run chart is an analysis tool for a single innings, showing where the scoring clustered, where dot-ball periods occurred, and the impact of wickets on run rate.
Uses in Coaching
Run charts are valuable for coaching analysis. Coaches can identify: which overs produced the most runs and why (bowling changes, field setting weaknesses), where partnerships were built versus where wickets clustered, and how the scoring rate changed across phases of the innings. Run charts are part of the analytics toolbox provided to professional coaching staff by data analysts.
Frequently asked questions
Are run charts available for historic matches?
Yes — ball-by-ball historical data for most international matches since approximately 2000 is available through ESPNcricinfo's API and similar databases, allowing run charts to be generated for past innings.
What is a dot ball in run chart terms?
A dot ball (no runs scored from a delivery) is shown as a flat section in the run chart — no upward movement. A cluster of dot balls produces a completely horizontal section, indicating a tight bowling spell or a batter playing very defensively.
How is a run chart different from a scorecard?
A scorecard shows individual batter scores and bowling figures as a summary. A run chart shows the sequential, temporal progression of the innings — the order in which runs were scored and when wickets fell.