Transaction signals come from when the Qstick indicator crosses through the zero line. Crossing above zero is used as the entry signal because it is indicating that buying pressure is increasing, while sell signals come from the indicator crossing down through zero. In addition, an 'n' period moving average of the Qstick values can be drawn to act as a signal line. Transaction signals are then generated when the Qstick value crosses through the trigger line.
Investment dictionary. Academic. 2012.