JM Hurst was an American Aeronautical engineer who published two seminal works about his Cyclic Theory of the movement of prices of financial markets:
The Profit Magic of Stock Transaction Timing
JM Hurst's Cycles Course (originally published as The Cyclitec Cycles Course)
The theory that he presents in the two is fundamentally the same theory, but in
the Cycles Course he presented a very different and much more advanced process than that presented in his book
Profit Magic Of Stock Transaction Timing.
The phasing analysis performed by Sentient Trader is a very faithful replication
of the process advocated in his Cycles Course.
Hurst's Cyclic Theory is a very large subject, and so we have gathered together
several resources to initiate your learning process:
Read this article published in Technical Analyst
in February 2011
Read this article published in Technical Analysis
of Stocks & Commodities in March 2011