Google "fat finger trade" and this is what is returned: https://www.google.com/search?source=hp&ei=CFUtWpidD4G6ggeElr_gBw&q=fat+finger+trade+meaning&oq=fat+finger+trade&gs_l=psy-ab.1.1.0l3j0i22i30k1l7.7422.15161.0.17220.26.18.4.3.3.0.259.2459.0j12j2.15.0....0...1c.1.64.psy-ab..4.22.2758.6..46j35i39k1j0i46k1j0i10k1.196.8FzA8RnTH8M You're welcome.