High numbers are the top half of the number field of a lotto game.
For example, if a lottery's number field is 5/50, the high numbers are
25-50. Usually, it is good to play a relatively even mix of high and
low numbers.
It is much less common for a drawing to have all high or all low numbers than it is for a mix of high and low.
High lotto numbers can be tracked using the Advantage Gold lotto chart,
Low High Bias Tracker Chart.
Screenshot of Advantage Gold, Low High Bias Tracker Chart