every trade the reader has replayed, newest first, and what each one did to the field.

 size in sol     weight
 under 0.1         1
 0.1               2
 0.3               3
 0.7               4
 1.5               5
 3.1               6
 6.3               7
 12.7              8
 25.5              9
 51.1             10
 102.3            11