Pivot Table conditional formatting with formula

[emmykav]

Week	a	b	c	d	e
1	15000	23377	17750	14564	14073
2	18000	23377	17750	14563	14074
3	23000	30008	20977	23999	14145
4	15000	23377	17750	14564	14074
5	21000	23377	17750	14564	14074
6	22000	32742	19428	18641	15835
7	25000	32742	19428	18641	15835
8	24000	32741	19428	18642	15836
9	22000	31642	20899	19837	15878
10	17000	41168	21920	22082	16581

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Please can somebody help me? I have a pivot table, see example above and need use conditional formatting to show when the difference between weeks is >2000 go red, but to stay red until the below cell drops below a difference of £3000. So for example a2:a3 & a5:a9 would turn red. Does anybody know? Obviously I need the conditional formatting to work every time I refresh the data too.

 

[Sam_D_Ben]

It's not clear.

Thanks Muz!

 

[emmykav]

It's not clear.

Thanks Muz!

Sorry! It's difficult for me to explain.

I need to format groups of high numbers basically.