Finding highest values above a threshold

[DoctorData]

mode calcs.xlsx
	A	B	C	D	E	F	G
2	Size (mm)	Amount (%)	Peak above	Peak above		Threshold A (above base)	2
3			Threshold A?	Threshold B?		Threshold B (above adjacent troughs)	2
4	63	0.00
5	45	14.22	45	45
6	31.5	4.99	FALSE	FALSE		First peak (above Threshold A)	45
7	22.4	1.24	FALSE	FALSE		Second highest peak (above Threshold A)	11.2
8	16	13.20	FALSE	FALSE		Third highest peak (above Threshold A)	4
9	11.2	13.80	11.2	FALSE
10	8	13.51	FALSE	FALSE		First peak (above Threshold B)	45
11	5.6	13.31	FALSE	FALSE		Second highest peak (above Threshold B)	4
12	4	15.89	4	4		Third highest peak (above Threshold B)	#NUM!
13	2.8	12.12	FALSE	FALSE
14	2	6.69	FALSE	FALSE
15	1.4	3.30	FALSE	FALSE
16	1	1.03
Sheet1

Cell Formulas
Range	Formula
C5:C15	C5	=IF(AND(B5>=B4,B5>B6,B5>=G$2),A5)
D5:D15	D5	=IF(AND(B5>=B4,B5>B6,B5>=G$2,(B5-B6)>G$3,(B5-B4)>G$3),A5)
G6	G6	=LARGE(C5:C15,1)
G7	G7	=LARGE(C5:C15,2)
G8	G8	=LARGE(C5:C15,3)
G10	G10	=LARGE(D5:D15,1)
G11	G11	=LARGE(D5:D15,2)
G12	G12	=LARGE(D5:D15,3)

I have sets of data where I want to find peaks (or 'modes'). These are actually amounts of stones in different sizes. The spreadsheet simply finds values where the values either side are lower. But I have two situations where I don't want peaks to be identified:

(1) Threshold A where peaks are not large. In the spreadsheet I have set an additional condition where the peak must be larger than 2% (but in this example all three peaks are larger than 2%)

(2) Threshold B where peaks are larger than adjacent troughs but a set amount. In the example I have set this to 2%. HOWEVER in the spreadsheet it only finds troughs one row above or below each value. I need to be able to identify a trough any distance above or below. In the example of Peak 2 the troughs are 2 rows up and 2 rows down. Is there a way to use INDEX and MATCH to search up and down from each point?