Can MoonBot filter a strategy’s performance if the market’s daily deltas are only in a certain range?

Yes, you can set such conditions on the Filters tab of the strategy settings, using the following parameters:
Delta_Market_24_Min: Minimum change in the average exchange rate of all altcoins in 24 hours, (in %) below which the bot does not consider the coin.
Delta_Market_24_Max: Maximum change in the average exchange rate of all altcoins in 24 hours, (in %) above which the bot does not consider the coin.