Updates

Every date on the site reads day-month-year. Downloaded CSV files keep the international YYYY-MM-DD form so they stay correctly sortable in spreadsheets.

Each pair page now states when the pair was introduced (the first day both instruments were trading), when its computed history begins, and when the figures were last recomputed. The chart and daily table show the last year; the CSV link gives the full history.

A pair's tracked history previously began only once the ratio first moved outside its band, which discarded several weeks of otherwise-usable history. Each pair now starts as soon as its rolling band can be computed. Start dates are earlier than before and returns shifted slightly as a result.

An audit against the exchange's official daily records found trading days absent from our price history, including a multi-week stretch for one instrument and several days where prices were missing across most of the list. These have been restored and every pair's history recomputed. An automated check now compares our prices against the official record.

Several ETFs have subdivided their units over the years. Prices from before those events were being carried on the older scale, which made a few pairs show a large false drop on a single day and badly distorted their long-run returns. All affected history has been rescaled and every pair recomputed. Backtested returns and drawdowns for the longest-running pairs changed substantially and are now correct.

Our previous price source began well after some instruments actually listed. Their earlier history has been filled in, so several pairs now backtest over a much longer period than before - in a few cases by years.

Now tracked alongside the existing pairs, with signals and a full backtest.