It is not possible to set the "Minimum" value for Awesome Oscillator Level (for example in "(AWO) Awesome Oscillator crosses above Level") to below 0 neither via the - or + button, nor by manually entering a -5 (for example). It´s default value is at -10 if clicking the "Reset to default" button and indeed, this indicator goes to negative values (checked in MT4), so it should be possible for us to enter custom negative values, please.
I just noticed that it ONLY will not allow you to go below 0 if you first set the Minimum to > 0. Once you´ve done that, you can´t use the "-" button to go into negative once again, nor can you enter a "-" value like "-5". Only if you´ve never left the negative values (default is -10), you can go to other negative values.