Some games going on here. Can anyone explain how instantaneously...

Some games going on here. Can anyone explain how instantaneously the SP can go from.07 to .066 and back to .07?

	Column 1	Column 2	Column 3
0	1:17:32 pm	0.0700	24,063
1	1:17:32 pm	0.0660	82,255
2	1:17:32 pm	0.0670	40,000
3	1:17:32 pm	0.0670	50,000
4	1:17:32 pm	0.0670	15,000
5	1:17:32 pm	0.0690	7,245
6	1:11:50 pm	0.0700	25,000