Luke served as Head of ETF Sales at Cantor Fitzgerald. While in this seat, he began to notice the importance that institutional trading activity had on the movements and direction of stocks. He spent years observing these activities and in his free time, with a partner, began designing quantitative models to look for unusual trading activity. He later moved to Jefferies, LLC as an SVP of Derivatives. There he published stock research based around the unusual activity signals he was developing. He later left Wall Street to work on this research full time at MAPsignals.com.