https://BitBank.nz BitMEX Market Making Bot
Clone or download
Pull request Compare This branch is 30 commits ahead, 12 commits behind BitMEX:master.
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Failed to load latest commit information.
market_maker
test
.gitignore
Makefile
README.md
__init__.py
marketmaker
requirements.txt
settings-ETHH18.py
settings-LTCH18.py
settings-XBTUSD.py
settings-XMRH18.py
setup.cfg
setup.py

README.md

BitBank/BitMEX Market Maker

A fork of the sample market making bot for use with BitMEX edited to have some sensible defaults for trading ethereum futures and to take into account projections in the base poloniex price from the https://BitBank.nz API

It is free to use and modify for your own strategies. It provides the following:

  • A BitMEX object wrapping the REST and WebSocket APIs.
    • All data is realtime and efficiently fetched via the WebSocket. This is the fastest way to get market data.
    • Orders may be created, queried, and cancelled via BitMEX.buy(), BitMEX.sell(), BitMEX.open_orders() and the like.
    • Withdrawals may be requested (but they still must be confirmed via email and 2FA).
    • Connection errors and WebSocket reconnection is handled for you.
    • Permanent API Key support is included.
  • A scaffolding for building your own trading strategies.
    • Out of the box, a simple market making strategy is implemented that blankets the bid and ask.
    • More complicated strategies are up to the user. Try incorporating index data, query other markets to catch moves early, or develop your own completely custom strategy.

Develop on Testnet first! Testnet trading is completely free and is identical to the live market.

BitMEX is not responsible for any losses incurred when using this code. This code is intended for sample purposes ONLY - do not use this code for real trades unless you fully understand what it does and what its caveats are.

This is not a sophisticated market making program. It is intended to show the basics of market making while abstracting some of the rote work of interacting with the BitMEX API. It does not make smart decisions and will likely lose money.

Getting Started

  • Create a BitBank.nz 1 day free trial Account for Live Crypto Forecasts
  • copy your api key to YOUR_API_KEY in Bitbank.py
  • Create a Testnet BitMEX Account and deposit some TBTC.
  • Clone this repo git clone git@github.com:BitBanknz/sample-market-maker.git
  • Install dependencies: pip3 install -r requirements.txt
  • Create settings.py to tune parameters and place your API_KEY and API_SECRET variables in there add your BitMEX API Key and Secret and change bot parameters.
    • Also you can create overrides for settings.py for specific pairs e.g. see settings-XBTUSD.py for bitcoin specific defaults
    • Note that user/password authentication is not supported.
    • Run with DRY_RUN=True to test cost and spread.
  1. Run it: python3 ./marketmaker [symbol]

  2. For more reliability run it with watch and timeout to restart every so often and keep running if it errors e.g. while true; do timeout --signal=KILL 1000 python3 ./marketmaker ETHH18; done while true; do timeout --signal=KILL 1000 python3 ./marketmaker LTCH18; done while true; do timeout --signal=KILL 1000 python3 ./marketmaker XBTUSD; done

  3. Satisfied with your bot's performance? Create a live API Key for your

    BitMEX account, set the BASE_URL and start trading!

Operation Overview

This market maker works on the following principles:

  • The market maker tracks the last bidPrice and askPrice of the quoted instrument to determine where to start quoting.
  • Based on parameters set by the user, the bot creates a descriptions of orders it would like to place.
    • Spread is determined by interval calculations and by Bitbank.py.
  • If the user specifies position limits, these are checked. If the current position is beyond a limit, the bot stops quoting that side of the market.
  • These order descriptors are compared with what the bot has currently placed in the market.
    • If an existing order can be amended to the desired value, it is amended.
    • Otherwise, a new order is created.
    • Extra orders are canceled.
  • The bot then prints details of contracts traded, tickers, and total delta.

Simplified Output

The following is some of what you can expect when running this bot:

2016-01-28 17:29:31,054 - INFO - market_maker - BitMEX Market Maker Version: 1.0
2016-01-28 17:29:31,074 - INFO - ws_thread - Connecting to wss://testnet.bitmex.com/realtime?subscribe=quote:XBT7D,trade:XBT7D,instrument,order:XBT7D,execution:XBT7D,margin,position
2016-01-28 17:29:31,074 - INFO - ws_thread - Authenticating with API Key.
2016-01-28 17:29:31,075 - INFO - ws_thread - Started thread
2016-01-28 17:29:32,079 - INFO - ws_thread - Connected to WS. Waiting for data images, this may take a moment...
2016-01-28 17:29:32,079 - INFO - ws_thread - Got all market data. Starting.
2016-01-28 17:29:32,079 - INFO - market_maker - Using symbol XBT7D.
2016-01-28 17:29:32,079 - INFO - market_maker - Order Manager initializing, connecting to BitMEX. Live run: executing real trades.
2016-01-28 17:29:32,079 - INFO - market_maker - Resetting current position. Cancelling all existing orders.
2016-01-28 17:29:33,460 - INFO - market_maker - XBT7D Ticker: Buy: 388.61, Sell: 389.89
2016-01-28 17:29:33,461 - INFO - market_maker - Start Positions: Buy: 388.62, Sell: 389.88, Mid: 389.25
2016-01-28 17:29:33,461 - INFO - market_maker - Current XBT Balance: 3.443498
2016-01-28 17:29:33,461 - INFO - market_maker - Current Contract Position: -1
2016-01-28 17:29:33,461 - INFO - market_maker - Avg Cost Price: 389.75
2016-01-28 17:29:33,461 - INFO - market_maker - Avg Entry Price: 389.75
2016-01-28 17:29:33,462 - INFO - market_maker - Contracts Traded This Run: 0
2016-01-28 17:29:33,462 - INFO - market_maker - Total Contract Delta: -17.7510 XBT
2016-01-28 17:29:33,462 - INFO - market_maker - Creating 4 orders:
2016-01-28 17:29:33,462 - INFO - market_maker - Sell 100 @ 389.88
2016-01-28 17:29:33,462 - INFO - market_maker - Sell 200 @ 390.27
2016-01-28 17:29:33,463 - INFO - market_maker -  Buy 100 @ 388.62
2016-01-28 17:29:33,463 - INFO - market_maker -  Buy 200 @ 388.23
-----
2016-01-28 17:29:37,366 - INFO - ws_thread - Execution: Sell 1 Contracts of XBT7D at 389.88
2016-01-28 17:29:38,943 - INFO - market_maker - XBT7D Ticker: Buy: 388.62, Sell: 389.88
2016-01-28 17:29:38,943 - INFO - market_maker - Start Positions: Buy: 388.62, Sell: 389.88, Mid: 389.25
2016-01-28 17:29:38,944 - INFO - market_maker - Current XBT Balance: 3.443496
2016-01-28 17:29:38,944 - INFO - market_maker - Current Contract Position: -2
2016-01-28 17:29:38,944 - INFO - market_maker - Avg Cost Price: 389.75
2016-01-28 17:29:38,944 - INFO - market_maker - Avg Entry Price: 389.75
2016-01-28 17:29:38,944 - INFO - market_maker - Contracts Traded This Run: -1
2016-01-28 17:29:38,944 - INFO - market_maker - Total Contract Delta: -17.7510 XBT
2016-01-28 17:29:38,945 - INFO - market_maker - Amending Sell: 99 @ 389.88 to 100 @ 389.88 (+0.00)

Advanced usage

You can implement custom trading strategies using the market maker. market_maker.OrderManager' controls placing, updating, and monitoring orders on BitMEX. To implement your own custom strategy, subclass market_maker.OrderManagerand overrideOrderManager.place_orders()`:

from market_maker.market_maker import OrderManager

class CustomOrderManager(OrderManager):
    def place_orders(self) -> None:
        # implement your custom strategy here

Your strategy should provide a set of orders. An order is a dict containing price, quantity, and whether the order is buy or sell. For example:

buy_order = {
    'price': 1234.5, # float
    'orderQty': 100, # int
    'side': 'Buy'
}

sell_order = {
    'price': 9876.5, # float
    'orderQty': 100, # int
    'side': 'Sell'
}

Call self.converge_orders() to submit your orders. converge_orders() will create, amend, and delete orders on BitMEX as necessary to match what you pass in:

def place_orders(self) -> None:
    buy_orders = []
    sell_orders = []

    # populate buy and sell orders, e.g.
    buy_orders.append({'price': 998.0, 'orderQty': 100, 'side': "Buy"})
    buy_orders.append({'price': 999.0, 'orderQty': 100, 'side': "Buy"})
    sell_orders.append({'price': 1000.0, 'orderQty': 100, 'side': "Sell"})
    sell_orders.append({'price': 1001.0, 'orderQty': 100, 'side': "Sell"})

    self.converge_orders(buy_orders, sell_orders)

To run your strategy, call run_loop():

order_manager = CustomOrderManager()
order_manager.run_loop()

Your custom strategy will run until you terminate the program with CTRL-C. There is an example in custom_strategy.py.

Notes on Rate Limiting

By default, the BitMEX API rate limit is 300 requests per 5 minute interval (avg 1/second).

This bot uses the WebSocket and bulk order placement/amend to greatly reduce the number of calls sent to the BitMEX API.

Most calls to the API consume one request, except:

  • Bulk order placement/amend: Consumes 0.1 requests, rounded up, per order. For example, placing 16 orders consumes 2 requests.
  • Bulk order cancel: Consumes 1 request no matter the size. Is not blocked by an exceeded ratelimit; cancels will always succeed. This bot will always cancel all orders on an error or interrupt.

If you are quoting multiple contracts and your ratelimit is becoming an obstacle, please email support with details of your quoting. In the vast majority of cases, we are able to raise a user's ratelimit without issue.

Troubleshooting

Common errors we've seen:

  • TypeError: __init__() got an unexpected keyword argument 'json'
    • This is caused by an outdated version of requests. Run pip install -U requests to update.

Compatibility

This module supports Python 3.5 and later.

See also

BitMEX has a Python REST client and websocket client.