Exchange Betting

Lay Value Calculator

Course
Fav win %
Lay win %
Rec. base edge
Form Analysis LOCAL · NO API
Jockey & Trainer
Jockey5
Solid professional, no strong signals
Trainer5
Average yard, no strong signals
Jockey & Trainer
Jockey5
Solid professional, no strong signals
Trainer5
Average yard, no strong signals
Jockey & Trainer
Jockey5
Solid professional, no strong signals
Trainer5
Average yard, no strong signals
Form Assessment
Suggested true win %
Lay strength
Race Dynamic
1st Fav
True win %
2nd Fav
True win %
3rd Fav
True win %
Race Inputs

Lay Edge
Required Edge
Market Implied
Lay Odds
Edge Breakdown
How the Edge Requirement Works
Lay Edge % = 100 − (True Win % × Lay Odds) Required Edge = Base (course %) + Field adj − Form reduction − J/T reduction − Market spread bonus

The required edge falls when: form strongly favours a lay, jockey/trainer are weak, or the 2nd/3rd favs are closely priced (market doesn't know who will win). It rises in small fields and when the favourite looks solid.

Ratings Database
Add / Update Jockey
Add / Update Trainer
Google Sheets Setup Guide
1Create a new Google Sheet at sheets.google.com
2Click ExtensionsApps Script
3Delete all existing code and paste in the google-apps-script.js file provided
4Click Save, then DeployNew deployment
5Set type: Web app · Execute as: Me · Access: Anyone
6Click Deploy and copy the Web App URL
7Go to the Ratings DB tab, paste the URL there, and click Push to Sheet