# Author Archives: Soccerwidow

## Arbitrage between Bookmakers and Cross Market Arbitrage

(1) Arbitrage between Two Bookmakers in One Betting Market This is the classic form of sports arbitrage (sure bets) in football betting. The arbitrage opportunity relies on at least two bookmakers evaluating the same event differently, each...

## Probability, Expectation, Hit Rate, Value, Mathematical Advantage: Explained

Introduction The terms probability, expectation, likelihood, chance and hit rate are all closely related, and express more or less the same thing. The difference is that before a game one talks about ‘chance’, ‘probability’,...

## Get Permission to Use Images Displayed on Soccerwidow

Copyright Law & Licencing The images we use for illustration purposes throughout this website are often stock photos, purchased from outstanding libraries such as Shutterstock. Image: alexkatkov (Shutterstock) We sometimes modify these...

## How to Calculate Average Odds in Football Betting

Sometimes it is necessary to figure out the average odds from a set of betting odds which can then be used as the basis for further calculations. For example, computing deviation and variance. When using odds in European format (decimal) you...

## What is the Ideal Sample Size for Accurate Predictions?

A common problem faced by data analysts is to decide upon the required sample size. This can be estimated by using various calculations and distribution functions. However, even if a statistician is readily available, the answer is not necessarily...

## Alexa Rank, Visitor Count & Country Popularity – Accuracy Problem

What is Alexa Ranking? How Important is it? In order to compare websites and evaluate their popularity there are several tools on the Internet which generate comparison information. One of the most well-known is Alexa Rank. Alexa is a subsidiary...

## Website Traffic Report: Soccerwidow / Fussballwitwe – October 2013

It is not just website owners who are interested in how their site performs or how much traffic their website receives. Concrete information about website traffic, visitor numbers, and page views is also particularly interesting for agencies...

## 1×2 Full-Time Table of Records – Value Bet Detector with H2H history

The 1×2 Full-Time table of records is a compilation of HDA data from 417 completed Value Bet Detector spreadsheets from 24 countries around the world. (League games with H2H history). Price: £12.50 (ex VAT; see below) 0% VAT to UK customers 0%...

## How Bookmakers’ Odds Match Public Opinion

A question we often receive from readers is why the Value Bet Detector requires 10 years’ head-to-head (H2H) data and why it is optimised to address matches where there has been a minimum of six H2H meetings in this time frame. Image:...

## 1×2 Betting System: Analysis of HDA Data and Strategy Development – LAY THE DRAW

Numerous Web sites and forums pay homage to the Lay The Draw strategy with prolific threads from supporters claiming to have found extremely lucrative 1×2 betting systems. Therefore, I have decided to explore lay the draw betting in detail...