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Steam Trade Volume

This chart represents live trade volume data from across the Steam network and annotates it with major events. (Note that many of the spikes are summer/winter Steam sales during which a lot of card trading happens):

Feel free to grab the raw data. Updates daily.

TradeTF has been collecting this data since April of 2019. Data from 2013-2018 was provided by BazaarTF. Special thanks to Spyfly from STN.tf for providing 5 months worth of data that I was missing.