Unfortunately, Market reports have now been retired and are not accessible from the new interface.
Market reports were part of our Legacy product that would show you what your listing's position is in Airbnb search results relative to similar listings in the area (in terms of price and size).
Since Airbnb updated their algorithm, it is no longer possible to generate accurate reports. Results in search are very different for each possible guests, meaning it is now impossible to replicate the search results accurately and give any valuable insight from a tool like this.