This statistics show how many History Differences fit into +/-10 range.
For example the latest two draws in Expert Lotto 6/49 Demo lottery have the following History differences:
|Level 0||Level 1||Level 2||Level 3||Level 4||Level 5||Level 6||Level 7||Level 8||Level 9||Level 10|
|2010/28 Sun 2nd||23||29||36||42||44||47||||+13||-14||-27||+17||+3||+8||+12||-5||+23||+11||+31|
|2010/28 Sun 1st||06||13||14||19||41||42||||-3||-28||-16||+16||-35||-7||+9||+7||+25||+16||+21|
You can see that in the latest draw 2010/28 Sun 2nd there are three Levels where the History difference is in the range of -10 to +10 (highlighted with blue background). In previous draw 2010/28 Sun 1st there are four such Levels (highlighted with green background).
If you analyze the whole winning numbers database of the Expert Lotto 6/49 Demo lottery you will find out that very frequently there are 4 to 5 Levels where the History differences are in the range -10 to +10.
The range values are adjustable in application options under menu Tools - Options - History - Ranges. The default values are -10 to +10.
These statistics are available in summary form and also as per-ticket properties.
See also Sums History ticket filter - condition The difference in X to Y levels is at most A to B - and Difference Ranges statistics.