In an era where computer algorithms automate trading at breakneck speeds, a dwindling number of London's metal traders still conduct business in-person by shouting orders across Europe's last so-called open-outcry trading floor.
The near 150-year old tradition takes place in a circle, or pit, of red-leather benches -- called the "Ring" -- where the daily global prices of copper, nickel, aluminium and other metals are set at the London Metal Exchange (LME).
