Long lookback periods causing very slow starts should use PRELOAD. But a strategy that has to be restarted after 3-4 days for some emergency reason should not fall victim of the "lowest common denominator'.

M1 ticks are needed not because BarOffset is critical for the system, but so that live and re-test performance are consistent and can be verified easily (especially in the initial period where a system is being fine-tuned before getting its full size).

Practically:

1) with BarOffset and data for half of Lookback period existing in a historical file, how will Zorro create candles for the Lookback?

Half - at exact bar periods (i.e. respecting BarOffset) - and the most recent half - with whatever is downloaded from the broker (not respecting BarOffset)?

2) Can a new flag/ variable pls be added that would force lookback backfill at the desired resolution?


Thank you!