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))

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

Learn how to read.

Did you ever figure out how to calculate liq price in hedge mode? (i.e with two opposite positions)