@sheikh Thank you for the comments.
The BTC spot we are using are daily data, and open/close/high/low are computed by matching the opening and closing time of the BTC Futures contracts. As we are working with daily resolution, we believe the spot BTC is ok for the current contest. Having the weekend data at disposal, signals can be built by using more information. Moreover, the previous time series were built matching the past spot data with the short futures data.
This change is not disruptive, as old algorithms developed on the BTC Futures will still run on the BTC Futures. You pointed in another thread the change in the leaderboard: many thanks, please allow us to check and fix it.
Most of the quants requested this change, so we went for it. Maybe in the future we will allow for both options, but please note that the BTC Futures have a short history, so they will have anyhow to be patched with spot data. Thanks for the suggestion.