Conditional Formatting Formula

[scliollio]

	JUL				AUG				SEP				OCT				NOV				DEC
FIELD 1	FIELD 2	FIELD 3		FIELD 1	FIELD 2	FIELD 3		FIELD 1	FIELD 2	FIELD 3		FIELD 1	FIELD 2	FIELD 3		FIELD 1	FIELD 2	FIELD 3		FIELD 1	FIELD 2	FIELD 3
-500	-350	445		-525	-357	225		-285	-337	235		-288	-275	225		100	125	25		75	150	70
250	225	25		-100	-75	25		-225	-235	10		75	150	75		-150	-200	50		25	50	25
75	180	88		-300	-100	200		-275	-300	25		-150	-225	75		55	125	70		-100	55	25
-100	-50	50		75	100	25		50	250	200		-100	-150	50		-175	-225	50		-180	-220	40

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EDIT:
So question for the above:

I'm trying to conditional format this, to where for each row of data, it checks just the field 2's for each month, and if it sees 3+ consecutive NEGATIVE field 2's, then it will highlight the boxes in yellow.

So for the above example:
Row 1 (of data) should have JUL, AUG, SEP, OCT highlighted.
Row 2 nothing highlighted
Row 3 AUG, SEP, OCT
Row 4 OCT, NOV, DEC