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))

@zaidanali028 write it out as a for loop unless you understand it:

lst = []
for p,mr,ma in maint_lookup_table:
    if pos < p:
        lst.append((mr,ma))
pct,amt = lst[0]

@highfestiva can you please drop the liquidation price formula for USDT FUTURES?

@numairawan What do you mean?

@highfestiva the formula/method that you are using to calculate the liquidation price. I am making a chrome extension for risk management and I want to show the real-time liquidation price when opening the position on Binance future.

https://www.binance.com/en-IN/support/faq/b3c689c1f50a44cabb3a84e663b81d93

This formula is kinda hard to understand.

Reverse engineer the code above or use the formula.

Thank you @highfestiva,i was able to understamd the broken down pieces u explained,I need one more explanation and thats all....

On line 41,that is assert (options.leverage is None) != (options.wallet_balance is None).Please break it down for me,I know assert() but how u used it here is a bit advanced,I will be much grateful if you help me break here down too,thanks

@zaidanali028 either balance should be used OR leverage. Never both nor neither. Sama sama!

Thanks boss,will work on that today

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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