Yes there's always an answer, but it I'd rather there not be a need for one.
People who are serious about optimizing a strategy will typically want to adjust more than one or two parameters over more than 1 or 2 weeks, but this seems to be the limit of what Ninja can do easily. I spend way to much time restarting Ninja, and cutting down my time frame and number of parameters just so I can actually get some results. It gets to be very frustrating after a while.
end of rant....
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