CLI Binance liquidation calculation formula

binance-liquidation-calculator.py

#!/usr/bin/env python3
'''2021-03-26: Reverse-engineer by searching for the following terms in features*.js:
    - bracketMaintenanceMarginRate
    - cumFastMaintenanceAmount
    - bracketNotionalFloor
    - bracketNotionalCap'''


# (max) position, maintenance margin, maintenance amount
maint_lookup_table = [
    (     50_000,  0.4,           0),
    (    250_000,  0.5,          50),
    (  1_000_000,  1.0,       1_300),
    ( 10_000_000,  2.5,      16_300),
    ( 20_000_000,  5.0,     266_300),
    ( 50_000_000, 10.0,   1_266_300),
    (100_000_000, 12.5,   2_516_300),
    (200_000_000, 15.0,   5_016_300),
    (300_000_000, 25.0,  25_016_300),
    (500_000_000, 50.0, 100_016_300),
]


def binance_btc_liq_balance(wallet_balance, contract_qty, entry_price):
    for max_position, maint_margin_rate_pct, maint_amount in maint_lookup_table:
        maint_margin_rate = maint_margin_rate_pct / 100
        liq_price = (wallet_balance + maint_amount - contract_qty*entry_price) / (abs(contract_qty) * (maint_margin_rate - (1 if contract_qty>=0 else -1)))
        base_balance = liq_price * abs(contract_qty)
        if base_balance <= max_position:
            break
    return round(liq_price, 2)


def binance_btc_liq_leverage(leverage, contract_qty, entry_price):
    wallet_balance = abs(contract_qty) * entry_price / leverage
    print('[Wallet-balance-equivalent of %s] '%wallet_balance, end='')
    return binance_btc_liq_balance(wallet_balance, contract_qty, entry_price)


if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument('--wallet-balance', type=float, help='wallet balance in USDT')
    parser.add_argument('--contract-quantity', required=True, type=float, help='contract quantity in BTC, negative for shorts')
    parser.add_argument('--entry-price', required=True, type=float, help='entry price in USDT')
    parser.add_argument('--leverage', type=int, help='leverage to use instead of wallet balance')
    options = parser.parse_args()
    assert (options.leverage is None) != (options.wallet_balance is None)
    if options.leverage:
        print(binance_btc_liq_leverage(options.leverage, options.contract_quantity, options.entry_price))
    else:
        print(binance_btc_liq_balance(options.wallet_balance, options.contract_quantity, options.entry_price))

Interesting, that sneaky move affects my bot. Will look into it.

Updated the algorithm.

Hi highfestive
could you please light me in for the following error that I'm facing, in run time?

usage: -c [-h] [--wallet-balance WALLET_BALANCE] --contract-quantity
          CONTRACT_QUANTITY --entry-price ENTRY_PRICE [--leverage LEVERAGE]
-c: error: the following arguments are required: --contract-quantity, --entry-price
Traceback (most recent call last):
  File "<string>", line 47, in <module>
  File "/usr/lib/python3.8/argparse.py", line 1780, in parse_args
args, argv = self.parse_known_args(args, namespace)
  File "/usr/lib/python3.8/argparse.py", line 1812, in parse_known_args
namespace, args = self._parse_known_args(args, namespace)
  File "/usr/lib/python3.8/argparse.py", line 2046, in _parse_known_args
self.error(_('the following arguments are required: %s') %
File "/usr/lib/python3.8/argparse.py", line 2533, in error
self.exit(2, _('%(prog)s: error: %(message)s\n') % args)
  File "/usr/lib/python3.8/argparse.py", line 2520, in exit
_sys.exit(status)
SystemExit: 2
> ```

What did you type?

Hello, I am a beginner and trying to run this code. but getting this error do you know why?
`usage: ipykernel_launcher.py [-h] [--wallet-balance WALLET_BALANCE] --contract-quantity CONTRACT_QUANTITY
--entry-price ENTRY_PRICE [--leverage LEVERAGE]
ipykernel_launcher.py: error: the following arguments are required: --contract-quantity, --entry-price
An exception has occurred, use %tb to see the full traceback.

SystemExit: 2`

@MikeMaxNow @highfestiva

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