I should have looked up the right configuration parameter.
I’m talking about this client parameter:
"wallchangeThreshold": 0.1,
Which is according to NuBot documentation:
Parameter | Default value | Description | Admitted values
wallchangeThreshold | 0.15 | how much the price needs to change to trigger a wall-shift. | double. Expressed in absolute percentage. 10 = 10% , 0.5 = 0.5%