stahrgazer wrote:Do you have a built-in time decay factor? I scanned this and your formula thread, but didn't catch it if you mentioned it.

The weight applied to each challenge is computed as the product of how many games in the challenge TIMES decay factor. I am using 2 years as the data window, so that means that a war from 2 years ago has 0% decay factor (means does not affect score anymore), 1.5 years ago has 25% decay factor, 1 year ago has 50% as decay factor, 6 months ago would be 75% as decay factor, yesterday would be 100% decay factor.

I can change data window from 2 years to any other integer without having to modify my code - it is a parameter that you can change by typing in an input box.