Binding angles with both feet turned outward. The park standard starts at +15°/−15°, which opens the hips evenly and makes riding switch workable at all.
The duck stance is what makes riding switch genuinely equivalent: with both feet turned outward, your body works the same in either direction of travel. The typical mistake is treating stance as a performance dial, as if more angle meant more trick. It isn't. In a small study of experienced freestyle riders, stance width and binding angle mainly changed tibia rotation on landing, while ollie jump height stayed unchanged — so setup is first and foremost a joint-load question, not a power question. Start at +15°/−15° and change it in small steps. What often gets missed: there is no setup that covers everything. For carving and freeriding, most riders run narrower with both angles pointing forward.