In 1973, already with a background of technical analysis with a Liverpool stockbroker, David joined Investment Research of Cambridge Limited, doyen of the technical analysis movement since its foundation in Cambridge in 1945 by Alec Ellinger. He became managing director in the 1980s and steered the business gradually away from published analysis newsletters to practical fund management for private clients and small pension schemes.
Feeling a keen sense of urgency to educate private investors, David held many evening seminars over the years and was author of a best-selling book “Charters on Charting”, published in 1995 and serialised in the Financial Times. Over many years he also spoke for IFTA, the US Market Technicians Association and many European Technical Analysis Societies. In 2000 he took early retirement, selling the business to Brown Shipley in London and today enjoys a varied life in Cambridge.