where can find this data?

eeerrrr...betfair

Try this http://form.horseracing.betfair.com/timeform and load the race you require it shows lowest price traded etc.

pleasure

http://promo.betfair.com/betfairsp/prices/

No. Data from 12/03/2010.

IPMAX
12.5
55
1000
1000
1000
1000
1000
900
120
1000
150
1000
1000
42
21
230
6.6
60
9.2
1000
1000
38
11.5
25
80
17
400
13
1000
100
250
65
1000
42
1000
1000
1000
8
55
1000
65
250
1000
1000
34
190
85
230
200
60
23
990
44
10
26
30
42
100
3.8
300
42
48
110
90
1000
42
300
450
85
90
10
200
8.4
1000
1000
1000
1000
1000
95
1000
1000
250
280
1000
900
1000
110
80
1000
1000
1000
1.5
500
350
50
1000
110
20
1000
1000
1000
34
130
1000
100
1000
1000
1000
1000
300
4
990
400
980
1000
140
1000
500
1000
170
270
1000
110
590
1000
190
990
1000
1000
1000
1000
1000
880
2.12
480
1000
1000
300
1000
1000
1000
2.8
1000
1.77
230
240
780
95
1000
150
160
95
1000
1000
85
1000
11
150
1000
330
1000
1000
1000
1000
1000
150
3.6
260
240
1000
500
100
7.6
1000
980
1000
1000
500
1000
10
80
1000
1000
1000
1000
250
80
990
1000
1000
1000
1.72
1000
100
250
26
1000
1000
1000
1000
1000
600
1000
28
140
1000
1000
1000
250
1000
1000
1000
250
19.5
1000
1000
400
1000
1000
1000
55
1000
1000
1000
1000
990
1000
500
1000
470
1000
6.4
1000
120
1000
1000
1000
1000
8
1000
100
1000
250
1000
1000
50
1000
1000
250
600
1000
1000
1000
250
8
1000
1000
1000
1000
1000
200
260
1000
260
300
250
80
46
1000
1000
1000
1000
1000
3.6
1000
360
230
900
1000
250
4.9
44
300
200
390
100
1000
1000

citroen999, won't the highest back price matched in running be 1000 for just about everything other than the winner?

i am trying to find the highest price that horses were layed inrunning as they were dropping out of the race...

Not here :p