Optimization
Auto data mode will optional turn date or nth day mode to true in the manager, when it was false in the worker.
So if nth was no trade, 1 in manager, then the worker will build nth trade no trade.
However when the system is rebuilt in the manager, it will be calculated as nth being all. This can save a lot of time in the build process as to change say 50,000 systems from nth no trade to trade takes some time.