This revision is from 2024/12/12 03:46. You can Restore it.

To make a custom exchange.

config.json

{
    "max_open_trades": 100, 
    "stake_currency": "USDT",
    "stake_amount": 1000,
    "dry_run": true,
    "dry_run_wallet": 100000,
    "cache": "none", //avoid lookahead bias
    "enable_protections": false, //avoid lookahead bias
    "exit_pricing":{
        "price_side": "other"
    },
    "entry_pricing": {
        "price_side": "other"
    },
    "exchange": {
        "name": "custard_tart",
        "key": "",
        "secret": "",
        "pair_whitelist": ["TSLA/USDT"],
        "pair_blacklist": []
    },
    "pairlists": [
            {
            "method": "StaticPairList",
            "pairs": ["TSLA/USDT"]
            }
    ]
}
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Run...

freqtrade backtesting -c user_data/config.json -s SMA --timerange=20240101-20240201
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and

freqtrade download-data --exchange custard_tart
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and

freqtrade download-data --config user_data/config.json --timeframes 1m --timerange 20240101-
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• freqtrade - ERROR - Exchange "custard_tart" is not known to the ccxt library and therefore not available for the bot.

There are 3 places to edit.

Step 1: Create a Custom Exchange Class

Create a new file custom_exchange.py in the freqtrade/exchange directory. In this file, define a class custardtart.py.

freqtrade/exchange/custardtart.py

from freqtrade.exchange import Exchange

class Custardtart(Exchange):
    def __init__(self, config, validate=True, exchange_config=None, load_leverage_tiers=False):

    @property
    def name(self):
        return "custardtart"
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Register it with freqtrade/exchange/__init__.py

from freqtrade.exchange.custardtart import Custardtart
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Add it to /freqtrade/exchange/common.py

SUPPORTED_EXCHANGES = [
    "custardtart",
]
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freqtrade/exchange/check_exchange.py

from freqtrade.exchange.common import MAP_EXCHANGE_CHILDCLASS, SUPPORTED_EXCHANGES

....

    exchange = config.get("exchange", {}).get("name", "").lower()
    if not exchange:
        raise OperationalException(
            f"This command requires a configured exchange. You should either use "
            f"`--exchange <exchange_name>` or specify a configuration file via `--config`.\n"
            f"The following exchanges are available for Freqtrade: "
            f'{", ".join(available_exchanges())}'
        )

    if exchange in SUPPORTED_EXCHANGES:
        print("Custardtart exchange recognized")
        return True
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Make sure the __pycache__ is deleted.

Run the test commands, ccxt is bypassed and the handler is registered, custardtart.py, now all the logic needs to be found in custardtart.py, API calls to the exchange and so on.

Make it so custardtart.py exits gracefully.