One of DeMark's well-known technical indicators, which he has trademarked--Sequendal--is a cyclical approach to market analysis, determinant on the market itself, DeMark explained. 3 JAYE BERNSTEIN: PSYCHOLOGIST TURNED TRADER . sqrt( myVariance ) STRING FUNCTIONS A string is oftentimes just a thing that we print out or pass fromone part of our program to another without regard for its contents. Other times, however, we need to know what's inside.