The NHL's public APIs supply rosters, transactions and draft results. Historical trades come from public transaction reports, entered and checked by hand where the APIs do not reach far enough back.

Some trade descriptions are adapted from Wikipedia's NHL entry draft articles, which are published under the Creative Commons Attribution-ShareAlike 4.0 licence (CC BY-SA 4.0). Text drawn from those articles is used here under the same licence. Wikipedia does not endorse this site or its use of the material.

The rest of the site is compiled work: pick provenance, transfer chains and the trade trees built on top of them. NHL Trade Tree is a fan run reference project with no NHL affiliation. The terms of use spell that out.