Hmm … Firstly people will mostly be using PRT-IG where this phenomenon does not apply (“continuous” CFDs instead of real Futures, though the real Futures exist there too) and secondly …
You can trust me that I use Autotrading for Futures but I don’t use Indicators at all. But also : I don’t use TimeFrames longer than 1 minute anywhere. And then the whole issue does not apply.
Notice that any Future is “able to” look back for quite a while, like 1 month or maybe two months (it just depends on when people trade them). But not a year etc.
So it got me thinking all right, but it is you yourself implying the impossible.
Technically it can be done like in backtest. But functionally it would really be odd – but gets me thinking :-). So we could wonder how much time in the past PRT allows us to look back. We could call it a bug if in Live this is not allowed at all, or say just two months. Again, the Futures have been there and even today a 1224 contract can be viewed quite some time back in the past. Below you can see that. But in any event, since PRT does not offer (virtual) continuous contracts other than in Backtesting (the XXXX versions), the data is quite worthless. You can see that below too. So people trade them (which was back then in the far future ! like today trading 1226), but there will be too few data to work with it reliably. For Indicators that is.
I hope you can follow me a little ?