This statistical property tracks the occurrence of low and high numbers at individual ticket positions. Number is low when it is in the lower half of number pool, number is high when it is in the upper half of number pool.
For example in a x/40 lottery, numbers 1 to 20 are low, numbers 21 to 40 are high numbers. In a x/49 lottery, numbers 1 to 24 are low, numbers 25 to 49 are high.
When analyzing e.g. the latest draw in Expert Lotto 6/49 Demo Lottery with winning numbers 23-29-36-42-44-47-[7] then column Low/High 1 in e.g. Winning Numbers Properties window shows value low because the first ticket number is low. Column Low/High 2 shows value high because the second ticket number is high.
See also Positional Low/High ticket filter.