You can watch the movie "Deadpool" streaming on several platforms:

• Disney+ offers "Deadpool" as part of its streaming catalog

• It is also available on Max and Max Amazon Channel for streaming

• Hulu streams "Deadpool" as well, with a free trial available for new subscribers

• You can buy or rent "Deadpool" on Amazon Video, Apple TV, Microsoft Store, Fandango At Home, and Spectrum On Demand

So, the easiest way is to stream it on Disney+, Hulu, or Max if you have a subscription, or you can rent or buy it digitally through various online stores