You can set this restriction in the MoonBot terminal on the Filters / Delta tab of the strategy settings using the following parameters:
Delta_3h_Min: The minimum delta value for 3 hours (in %) below which the strategy does not consider the coin.
Delta_3h_Max: The maximum delta value for 3 hours (in %) above which the strategy does not consider the coin.
To ensure that this parameter is checked by the strategy, set IgnoreFilters = NO on the general Filters tab, and set IgnoreDelta = NO on the Filters / Delta tab. A green vertical bar should be visible to the left of the Filters / Delta tab, indicating that this tab and the parameters in it are not being ignored.