In his court plea, Liew described working with others at his own bank and at two other operations. He refers to “The Legend,” without naming him, at another unidentified global bank. Many details are cloaked. Liew himself is described as a trader for Bank A, which a person familiar with the situation said is Deutsche Bank AG.

According to the documents, at least two senior colleagues taught Liew how small orders could be placed and then quickly pulled, pushing prices in a direction to benefit traders with client orders to fill. Within a couple years, he was teaching newer traders to do the same. In all, according to the filings, he attempted to move prices on Chicago’s CME more than 300 times before he left.