# MT5 Python market_book_get()

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This is the markdown version of https://openbrokerapi.com/platforms/metatrader-5/functions/python-market-book-get, written from the same records as that page.

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Returns the current depth of market for one instrument, once market_book_add() has subscribed the terminal to it.

- Function: `market_book_get()`
- Interface: MetaTrader5 Python package
- Group: Market depth
- Status: verified. Source: [mql5.com](https://www.mql5.com/en/docs/python_metatrader5/mt5marketbookget_py), checked 2026-10-12.

This is a Python function, not an HTTP endpoint. It has no method, no path and no address to send a request to: the package talks to a MetaTrader 5 terminal running on the same computer. It is in no OpenAPI file on this site and the request builder does not list it.

## Signature

The form of the call on the vendor's page, with the vendor's comments taken out.

```python
market_book_get(
  symbol
)
```

## Arguments

- `symbol` (type not stated, required): The instrument's name. Given without a parameter name.

## Return value

- Type: `tuple or None`
- What comes back: A tuple of BookInfo entries, each with an order type, a price and a volume in lots. The page likens BookInfo to the MqlBookInfo structure of MQL5. On failure the page says it returns None, and that last_error() gives the reason.

## Sample

Written by this site from the signature and arguments recorded on this page. It has not been run against a terminal, a server or an account, and the values in it are placeholders. No credential is typed into it: where one is needed it is read from an environment variable on your own machine. Nothing is entered on this site.

```python
import MetaTrader5 as mt5

if not mt5.initialize():
    raise SystemExit(f"initialize() failed: {mt5.last_error()}")

if mt5.market_book_add("EURUSD"):
    book = mt5.market_book_get("EURUSD")
    for entry in book or ():
        print(entry.type, entry.price, entry.volume)
    mt5.market_book_release("EURUSD")

mt5.shutdown()
```

## Related MT5 Python functions: Market depth

- [market_book_add()](https://openbrokerapi.com/platforms/metatrader-5/functions/python-market-book-add): Subscribes the terminal to changes in the depth of market for one instrument, which is what makes market_book_get() return data.
- [market_book_release()](https://openbrokerapi.com/platforms/metatrader-5/functions/python-market-book-release): Ends the terminal's subscription to depth of market changes for one instrument.

## More on MetaTrader 5

- [All MetaTrader 5 functions](https://openbrokerapi.com/platforms/metatrader-5/functions): 78 documented here, grouped by what they do.
- [MetaTrader 5 API quickstart](https://openbrokerapi.com/platforms/metatrader-5/quickstart)
- [All MetaTrader 5 error codes](https://openbrokerapi.com/errors/mt5)
- [MetaTrader 5 API page](https://openbrokerapi.com/platforms/metatrader-5): The full record: access, authentication, limits and the source for each.

## Licence and how to cite

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Cite as: MT5 Python market_book_get(). Broker API Hub, https://openbrokerapi.com/platforms/metatrader-5/functions/python-market-book-get, newest check 2026-10-12.

Where you rely on a single figure, cite the source and the checked date printed beside it as well. Where this page and a broker's own documentation differ, the documentation wins.