I noticed that NT always connects and fetches historical data for instruments that I backtest on.
Even if I do consecutive tests with the same bars on the same instrument, everytime I hit backtest or optimize, the control central always shows a status that is connects and saves the historical data before starting to optimize.
I remember that before it wasnt like that...and when I connect and optimize on one instrument , the next time I backtest on that same instrument with the same bars, the optimization process would normally start instantly (and thus save some substantial amount of time).
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