Can the MoonBot filter a strategy if the hourly market 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_Min: The average of all altcoins’ hourly delta, not less than (in %). Averaged over all pairs. It may be negative.
Delta_Market_Max: Delta_Market_Max: Average hourly delta across all markets (not less than (in %).