Examples and tutorials
Options
Equity options: Introduction
Options on futures: Introduction
All options with a given underlying
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A high-frequency liquidity-taking strategy
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Databento US Equities Basic
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Release notes
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Data
2025-08-26
2025-08-05
2025-07-25
2025-07-06
2025-07-01
2025-06-27
2025-06-17
2025-06-10
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2024-12-02
2024-10-22
2024-10-24
2024-07-05
2024-06-25
2024-06-18
2024-05-07
2024-01-18
2023-11-17
2023-10-04
2023-08-29
2023-07-23
2023-05-01
2023-04-28
2023-03-07
Collapse all
Examples and tutorials
Order book
Types of order book events
Overview
This example shows how to use the Historical client to retrieve individual order events and process all events for a single order. This will allow us to track the life cycle of an order, such as when it was added to the order book and when it was removed.
MBO schemas
We'll use the MBO schema for this example. This is the most granular schema which contains every individual order event keyed by its order ID.
Example
import databento as db
# First, create a historical client
client = db.Historical("$YOUR_API_KEY")
# Next, we will request a minute of MBO data
data = client.timeseries.get_range(
dataset="GLBX.MDP3",
start="2022-08-26T10:59:00",
end="2022-08-26T11:00:00",
symbols="ES.v.0",
stype_in="continuous",
schema="mbo",
)
df = data.to_df()
# Now, we will inspect the history of a particular order
ORDER_ID = 6410543150678
order_df = df.loc[df["order_id"] == ORDER_ID]
# Finally, we will process each event for this order
print(f"events for order_id: {ORDER_ID}")
for index, row in order_df.iterrows():
event = (row["price"], row["size"])
action = row["action"]
if action == "A":
# Add action
print(index, *event, "[A]dded", sep="\t")
elif action == "C":
# Cancel action
print(index, *event, "[C]anceled", sep="\t")
elif action == "M":
# Modify action
print(index, *event, "[M]odified", sep="\t")
elif action == "R":
# Book clear action
print(index, *event, "clea[R]ed", sep="\t")
elif action == "T":
# Trade action
print(index, *event, "[T]raded", sep="\t")
elif action == "F":
# Fill action
print(index, *event, "[F]illed", sep="\t")
elif action == "N":
# None action
print(index, *event, "[N]one", sep="\t")
Result
events for order_id: 6410543150678
2022-08-26 10:59:37.217088184+00:00 4184.75 14 [A]dded
2022-08-26 10:59:50.544746948+00:00 4184.75 7 [F]illed
2022-08-26 10:59:50.544805832+00:00 4184.75 7 [M]odified
2022-08-26 10:59:50.544805832+00:00 4184.75 1 [F]illed
2022-08-26 10:59:50.544805832+00:00 4184.75 6 [M]odified
2022-08-26 10:59:50.544880884+00:00 4184.75 1 [F]illed
2022-08-26 10:59:50.544880884+00:00 4184.75 5 [M]odified
2022-08-26 10:59:50.544927788+00:00 4184.75 1 [F]illed
2022-08-26 10:59:50.544927788+00:00 4184.75 4 [M]odified
2022-08-26 10:59:50.544927788+00:00 4184.75 1 [F]illed
2022-08-26 10:59:50.544927788+00:00 4184.75 3 [M]odified
2022-08-26 10:59:50.545075499+00:00 4184.75 3 [F]illed
2022-08-26 10:59:50.545093643+00:00 4184.75 3 [C]anceled