-
Best would be to update the function to pad out nulls when needed:
q)f:{i:az -1+(where deltas y xrank az:asc z),count z;(`$x,/:string 1+til y)!i,(y-count i)#0N}
q)r:exec f["Ask_";6;AskOrder],f["Bid_";6;BidOrder] by stock from st
q){`stock xcols update stock:key x from (value x)[`AskOrder],'(value x)[`BidOrder]} r
stock Ask_1 Ask_2 Ask_3 Ask_4 Ask_5 Ask_6 Bid_1 Bid_2 Bid_3 Bid_4 Bid_5 Bid_6
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a 17 28 59 61 64 34 49 52 90 92
b 41 46 74 92 94 97 26 30 70 82 88 93
c 6 35 35 37 96 2 30 30 38 58
d 4 4 7 10 66 96 12 23 38 39 45 61
e 4 21 49 68 91 92 28 59 66 84 97 97
f 10 18 45 65 83 91 8 39 43 64 77 78
g 5 16 16 30 59 62 84 84 90 97
h 48 51 56 59 71 12 45 47 82 95
i 10 15 37 48 59 91 24 37 52 68 69 84
j 0 57 57 66 74 36 63 63 73 83
k 14 19 43 46 58 60 30 37 50 53 90 99
l 25 29 33 49 59 98 6 26 59 60 68 93
m 9 65 65 74 88 12 64 64 66 77
n 14 14 40 40 98 44 44 73 73 93
o 32 46 50 63 70 80 20 32 54 89 93 94
p 4 48 48 51 92 23 40 41 74 88