Registering:

The first requirement to play WoKJ's Box Office Derby is to register with the site. You can register on WoKJ by clicking here.

If you have previously registered for WoKJ's forum, then you are already eligible to play.

If you have previously registered for WoKJ's forum, then you are already eligible to play.

How to play the game:

To play the game, you need to visit the Predict section weekly and predict how much money (in millions) each movie listed will make over the specified time period (typically the weekend). You must do so before the deadline.

That's it! Enter a prediction and you're a part of the game.

Each week a new set of movies will appear for you to predict, and each week there will be a new winner. The game tracks your results for each week, quarter and year. Quarterly and yearly charts are based on your total accuracy over the given time frame, so the more weeks you predict, the higher on the charts you can get!

That's it! Enter a prediction and you're a part of the game.

Each week a new set of movies will appear for you to predict, and each week there will be a new winner. The game tracks your results for each week, quarter and year. Quarterly and yearly charts are based on your total accuracy over the given time frame, so the more weeks you predict, the higher on the charts you can get!

How do I win:

Once the actual gross of each movie is released, each player's predictions will be scored for accuracy. The player with the highest accuracy wins the week.

Formula for accuracy: (1 - (absolute value of(prediction - actual) / actual)) * 100. Then we do some rounding and formatting. Any negative result is scored a 0, you don't get negative points for completly botching a movie.

The above formula is used to score each movie, we then add all 10 scores and divide by 10. The result is your score. Here are some examples:

- If the actual gross is $7, and your prediction is $15.2, then your accuracy is a negative number which we convert to 0.

- If the actual gross is $3.5, and your prediction is $2.6, then your accuracy is 74.29.

Formula for accuracy: (1 - (absolute value of(prediction - actual) / actual)) * 100. Then we do some rounding and formatting. Any negative result is scored a 0, you don't get negative points for completly botching a movie.

The above formula is used to score each movie, we then add all 10 scores and divide by 10. The result is your score. Here are some examples:

- If the actual gross is $7, and your prediction is $15.2, then your accuracy is a negative number which we convert to 0.

- If the actual gross is $3.5, and your prediction is $2.6, then your accuracy is 74.29.

Can I win prizes:

There will be prizes for the quarterly and yearly winners, but we haven't solidified what those prizes will be. Our intention is to make them available to anyone. As of right now, I expect each quarterly winner to get an gift certificate to something like Amazon / Fandango / etc in the range of $15-20 for quarterly winners and $40-50 for the yearly winner.

What is a Relative Score:

Your relative score is a measure of how you fared against the average. The idea behind this metric is two fold:

1) On yearly and quarterly charts the standard score penalizes you for missing a week. You get a 0, and it drops your score significantly. The relative score does not penalize you for missing weeks, thus providing a separate metric which can be useful in certain scenarios. We plan to use it to rank the all-time chart, though players will still have to meet a minimum games played to be listed.

2) The relative score takes into account the derby average, so if you're allowing missed weeks it provides a great way to measure one week against another. Basically, it puts each week on an even playing level. One week could have a 65% average, another a 80% average. The relative score then shows how dominant a player was over those weeks. Were they just barely beating the competition? Were they below average?

When you look at the above, if you're ranking on score alone, Jon will have a slightly higher score. Yet clearly, Tim won the common week, and clearly excelled in Week 3 where the average player struggled. Tim was also above the average each week he played, Jon was not. The only reason Jon wins in score is because he played the easy week while Tim played the hard week.

The relative score would take this into account. Tim would be +12.5 while Jon would be -3.5. Long story short, the relative score provides a metric with an improved ability to measure a players performance across dissimilar weeks.

1) On yearly and quarterly charts the standard score penalizes you for missing a week. You get a 0, and it drops your score significantly. The relative score does not penalize you for missing weeks, thus providing a separate metric which can be useful in certain scenarios. We plan to use it to rank the all-time chart, though players will still have to meet a minimum games played to be listed.

2) The relative score takes into account the derby average, so if you're allowing missed weeks it provides a great way to measure one week against another. Basically, it puts each week on an even playing level. One week could have a 65% average, another a 80% average. The relative score then shows how dominant a player was over those weeks. Were they just barely beating the competition? Were they below average?

When you look at the above, if you're ranking on score alone, Jon will have a slightly higher score. Yet clearly, Tim won the common week, and clearly excelled in Week 3 where the average player struggled. Tim was also above the average each week he played, Jon was not. The only reason Jon wins in score is because he played the easy week while Tim played the hard week.

The relative score would take this into account. Tim would be +12.5 while Jon would be -3.5. Long story short, the relative score provides a metric with an improved ability to measure a players performance across dissimilar weeks.

The idea behind this chart is to give you the ability to see how the derby as a whole is trending with just a quick glance. Here's how the chart works:

The y axis represents a score. The x axis has an entry for the past 12 games. Each 'candle' on the chart represents a game. The vertical line in each candle goes from the highest score to the lowest score for that week. That rectangle in the middle represents where the middle 50% of players scored, it drops off the top and bottom 25% of players. The color of the week is determined based on how the derby did against the prior week: If the top end of the middle rectangle is higher than the prior week, it will be white, otherwise it will be blue.

The y axis represents a score. The x axis has an entry for the past 12 games. Each 'candle' on the chart represents a game. The vertical line in each candle goes from the highest score to the lowest score for that week. That rectangle in the middle represents where the middle 50% of players scored, it drops off the top and bottom 25% of players. The color of the week is determined based on how the derby did against the prior week: If the top end of the middle rectangle is higher than the prior week, it will be white, otherwise it will be blue.