Question: Who has coached at more schools, Jerry Tarkanian or Richard Donchian?
Context: The Donchian channel is an indicator used in market trading developed by Richard Donchian.  It is formed by taking the highest high and the lowest low of the last "n" periods.  The area between the high and the low is the channel for the period chosen. Richard Davoud Donchian (born September 1905, Hartford, Connecticut – d. 1993) was an Armenian-American commodities and futures trader, and pioneer in the field of managed futures. The 6th Man, sometimes titled The Sixth Man, is a 1997 American sports comedy film directed by Randall Miller, starring Marlon Wayans and Kadeem Hardison.  The film was released in the United States on March 28, 1997.  The film features real National Collegiate Athletic Association (NCAA) schools, although the rosters are fictitious.  Some schools shown in the film include the University of Washington, University of Massachusetts Amherst, Fresno State University, Georgetown University, the University of Kentucky, the University of Arkansas, UCLA, and others.  The film features cameos from college basketball personalities such as Jerry Tarkanian and Dick Vitale. The Las Vegas Stars was a professional basketball team in the International Basketball League.  The inaugural head coach was George Tarkanian, son of famed coach Jerry Tarkanian.  The CEO/General Manager, Alexis Levi-Scott, became the first African American female owner in professional basketball when she purchased the team. Russ Granik is an American sports executive who served as Deputy Commissioner of the NBA for 22 years.  He retired from that position on July 1, 2006, after 30 years with the NBA.  Granik was inducted into the Naismith Memorial Basketball Hall of Fame on September 8, 2013, alongside basketball legends including Gary Payton, Bernard King, Rick Pitino, and Jerry Tarkanian.  He was enshrined into the Hall of Fame by Jerry Colangelo.  During his professional career, Granik served as the announcer of second-round picks in the NBA Draft and in later years, the television host of the NBA Draft Lottery. John Welch (born February 17, 1963) is an American former basketball player currently working as an assistant coach for the Los Angeles Clippers of the National Basketball Association (NBA).  He played professionally in New Zealand where in 1988, he earned Most Outstanding Guard and All-Star Five honors playing for Waitemata.  Throughout his coaching career, he has worked with or worked under various notable basketball people, including Jerry Tarkanian, Jerry West, Hubie Brown, George Karl and Tim Grgurich. Jerry Tarkanian (August 8, 1930 – February 11, 2015) was an American basketball coach.  He coached college basketball for 31 seasons over five decades at three schools.  He spent the majority of his career coaching with the UNLV Runnin' Rebels, leading them four times to the Final Four of the NCAA Men's Division I Basketball Tournament, winning the national championship in 1990.  Tarkanian revolutionized the college game at UNLV, utilizing a pressing defense to fuel its fast-paced offense.  Overall, he won over 700 games in his career, and only twice failed to win 20 games in a season.  Tarkanian was inducted into the Naismith Memorial Basketball Hall of Fame in 2013. Che' Jones (born April 11, 1971, Columbus, Ohio) is a long time Las Vegas resident who played college basketball at the Ohio State University-Newark, where he ended his career as the second all-time leading scorer in Ohio State-Newark history scoring 1,693 points.  Jones finished his career at Ohio State-Newark second in assists and notched the highest free-throw percentage for a season in the 1999-2000 season with 91.9%.  He is also the all-time leader in three-point field goals made, as well as steals.  The University retired his jersey (#5) on February 26, 2001.  Jones also played professional basketball in Cyprus.  He is currently an assistant coach at Phoenix College in Phoenix, Arizona.  On March 22, 2014 the Phoenix College Bears defeated Essex College for the NJCAA DII National Championship.  Prior to coaching at Phoenix College he coached at Northern Arizona University, where he also earned his Master's degree in Higher Education.  He was also the associate head coach at Glen Oaks Community College in Centreville, Michigan.  Prior to Glen Oaks Community College he was the associate head coach at Albion College, a NCAA division III college in Albion, Michigan.  During the 2007-2008 season he was the head assistant coach at Casper College, a junior college in Casper, Wyoming.  He just recently was the head basketball coach of the Las Vegas Venom of the American Basketball Association (ABA) and an assistant coach to George Tarkanian son of famed coach Jerry Tarkanian, with the Las Vegas Stars of the IBL (International Basketball League).  Che' also coached at Urbana University in Urbana, Ohio and also at Columbus State University where his team was ranked number one in the country for the entire season and ended their season at 29-2 after losing to the eventual National Champion in the NJCAA Regional Championship game. The 1990–91 UNLV Runnin' Rebels basketball team represented the University of Nevada, Las Vegas in NCAA Division I men's competition in the 1990–91 season.  The Runnin' Rebels, coached by Jerry Tarkanian, entered the season as defending national champions and entered the 1991 NCAA tournament unbeaten, but lost in the national semifinal to eventual champions Duke when Anderson Hunt's desperation three in the final seconds bounced off the backboard and into the hands of a Duke player, Bobby Hurley.  They had been the last team to finish the regular season unbeaten before St. Joseph's did it in 2004.  They were the last team to enter the NCAA tournament unbeaten until Wichita State did it in 2014 and Kentucky in 2015. The 1989–90 UNLV Runnin' Rebels basketball team represented the University of Nevada Las Vegas in NCAA Division I men's competition in the 1989–90 season, and won the NCAA title under head coach Jerry Tarkanian.  The team played its home games in the Thomas & Mack Center, and was a member of the Big West Conference; it would join the Western Athletic Conference in 1996 and become a charter member of its current conference, the Mountain West Conference, in 1999.  As of the present, they are the last team from any of the non-big six conferences (ACC, Big East, Big Ten, Big 12, Pac-10, and SEC) to win the national championship.
Answer: Jerry Tarkanian