Limit Order Book Simulation (June 10, 2019)

138K order events over 36 seconds with bid/ask prices, quantities, and actions — mid-price rises 0.9% then pulls back.
# timestamp
side
action
id
price
quantity
+
1 0 b a 0 9990 11
2 0 b a 1 9990 16
3 0 a a 2 9995 1
4 0 b a 3 9990 6
5 0 b a 4 9990 1
6 0 b a 5 9985 1
7 0 a a 6 10000 1
8 0 b a 7 9985 1
9 0 a a 8 10000 1
10 0 b a 9 9985 1
11 0 a a 10 10000 1
12 0 b a 11 9985 1
13 0 a a 12 10000 1
14 0 b a 13 9985 1
15 0 b a 14 9985 1
16 0 a a 15 10005 1
17 0 b a 16 9985 2
18 0 b a 17 9985 1
19 22 a a 18 10005 1
20 22 a a 19 10010 1
21 22 b a 20 9985 1
22 22 a a 21 10010 1
23 22 b a 22 9985 1
24 22 b a 23 9980 1
25 22 a a 24 10010 1
26 22 a a 25 10010 1
27 22 a a 26 10010 1
28 22 b a 27 9980 1
29 22 b a 28 9980 1
30 22 a a 29 10015 4
31 22 b a 30 9980 1
32 22 a a 31 10015 1
33 22 b a 32 9980 4
34 22 a a 33 10015 1
35 37 b a 34 9975 22
36 37 a a 35 10015 1
37 37 a a 36 10015 1
38 37 a a 37 10015 1
39 37 b a 38 9975 1
40 37 a a 39 10015 10
41 37 a a 40 10015 5
42 37 b a 41 9975 1
43 37 a a 42 10020 6
44 37 a a 43 10020 2
45 37 b a 44 9975 1
46 37 b a 45 9975 8
47 37 a a 46 10020 16
48 45 a a 47 10020 1
49 45 a a 48 10020 1
50 45 b a 49 9970 19
51 45 a a 50 10020 1
52 45 b a 51 9970 1
53 45 a a 52 10020 1
54 45 a a 53 10020 1
55 45 b a 54 9970 1
56 45 a a 55 10020 12
57 45 b a 56 9970 1
58 45 a a 57 10020 12
59 45 a a 58 10020 1
60 45 b a 59 9970 27
61 45 a a 60 10025 1
62 45 a a 61 10025 1
63 64 a a 62 10025 1
64 64 b a 63 9965 1
65 64 a a 64 10025 1
66 64 b a 65 9965 1
67 64 b a 66 9965 1
68 64 a a 67 10025 40
69 64 a a 68 10025 26
70 64 b a 69 9965 8
71 64 b a 70 9965 7
72 64 a a 71 10030 6
73 76 a a 72 10030 34
74 76 b a 73 9960 76
75 76 a a 74 10030 1
76 76 a a 75 10030 1
77 76 a a 76 10030 1
78 76 a a 77 10030 1
79 76 b a 78 9960 1
80 76 b a 79 9960 1
81 76 b a 80 9960 1
82 76 a a 81 10030 9
83 76 b a 82 9960 12
84 76 b a 83 9955 3
85 76 a a 84 10035 2
86 76 b a 85 9955 58
87 76 a a 86 10035 5
88 116 b a 87 9955 1
89 116 a a 88 10035 4
90 116 b a 89 9955 1
91 116 b a 90 9955 1
92 116 b a 91 9955 1
93 116 a a 92 10035 1
94 116 b a 93 9955 1
95 116 b a 94 9955 1
96 116 a a 95 10035 1
97 116 a a 96 10035 1
98 116 b a 97 9955 1
99 116 a a 98 10035 1
100 116 b a 99 9950 4

Limit Order Book Simulation (June 10, 2019) — AI Analysis

Mid-price rallied 0.9% (10,003 → 10,093) in 20 seconds then pulled back to 10,053 — a classic mean-reversion pattern

Bid-side activity dominated at 60% of total volume, signaling persistent buying pressure

Order Book Analysis

  • Mid-price rose from 10,003 to a peak of 10,093 (+0.9%) at t=21s, then reverted to 10,053 by the end of the 36-second window
  • Bid-side orders accounted for 60% of total volume (207,987 vs 137,964 shares on the ask side)
  • Event rate spiked from ~1,200/sec in the first 5 seconds to 6,971/sec at second 18, suggesting a burst of algorithmic activity
  • Spreads remained tight at just 5 ticks for 78% of samples, indicating a highly liquid market
  • Order modifications were rare (1.6% of events), with most book updates being clean add/delete cycles

Order Flow Analysis

  • 138,813 order book events in 36 seconds: 68,987 new orders, 67,656 cancellations, and 2,170 modifications
  • Price rose from ~10,020 to peak ~10,102 at second 20, then fell back to ~10,025 — a symmetric V-shaped reversal
  • Buy-side dominated with 62% of all events (86,679 vs 52,134 ask-side), and total bid volume exceeded ask volume 1.5:1
  • Cancellation rate nearly matched new orders (98%), suggesting aggressive quote updating typical of high-frequency market making
  • The most active price level was 10,065 with 10,217 events — the gravitational center of the order book

Visualizations

Event Count by Price Level
Bid vs Ask Volume Per Second
Order Events Per Second
Mid-Price Over Time

This dataset contains 138,813 records across 6 fields: timestamp, side, action, id, price, quantity.

138813 rows · 6 columns · 2026-03-24

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