Specifications
| Underlying | Tick size | Quantity step | IMF factor | Position limit weight |
| BTC | $0.25 | 0.0001 | 0.002 | 1 |
| ETH | $0.01 | 0.001 | 0.0004 | 1.2 |
| USDT | $0.0001 | 1 | 0.00001 | 0.5 |
| EOS | $0.00025 | 0.1 | 0.0001 | 3 |
| XRP | $0.000025 | 1 | 0.00002 | 4 |
| BNB | $0.0025 | 0.1 | 0.0005 | 5 |
| TRX | $0.0000025 | 1 | 0.00001 | 5 |
| LEO | $0.0001 | 1 | 0.0002 | 10 |
| BCH | $0.05 | 0.001 | 0.0008 | 5 |
| ALGO | $0.0001 | 1 | 0.00015 | 10 |
| LTC | $0.01 | 0.01 | 0.0004 | 5 |
| BSV | $0.01 | 0.01 | 0.001 | 5 |
| ALT | $0.01 | 0.001 | 0.0008 | 2 |
| MID | $0.1 | 0.001 | 0.001 | 3 |
| SHIT | $0.1 | 0.001 | 0.002 | 5 |
| HT | $0.0005 | 0.01 | 0.0003 | 10 |
| OKB | $0.0005 | 0.01 | 0.0003 | 10 |
| EXCH | $0.1 | 0.001 | 0.003 | 8 |
| ETC | $0.0005 | 0.1 | 0.0002 | 3 |
Accounts
Position notional: position size * MP
IMF Factor: multiplier on the margin required for a coin.
Base IMF: the minimum initial margin fraction needed. This is 1 / maximum leverage.
Position initial margin fraction: max(Base IMF, IMF factor * sqrt(position open size))
Position maintenance margin fraction: max([3% if you're using 20x maximum leverage or less, 0.60% if you're using 50x maximum leverage or more], 0.6 * position initial margin fraction)
Position unrealized PNL: size * (future mark price - position entry price)
Collateral: USD balance in futures wallet plus 0.95 times BTC and USDT balance marked to latest index price.
Free collateral: amount of USD that can be withdrawn from exchange, =min(collateral, collateral + unrealized PNL) - [amount of collateral tied up in open orders]
Total account value: collateral + unrealized pnl
Total position notional: sum of abs(position notional) across all positions
Margin fraction [MF]: total account value / total position notional
Maintenance Margin Fraction Requirement [MMF]: the minimum MF needed to avoid getting liquidated, equal to average of position MMF weighed by position notional
Auto Close Margin Fraction [ACMF]: the minimum MF needed to avoid getting closed against the backstop liquidity provider or other users, = max(MMF / 2, MMF - 0.06 * MM)
Zero Price (ZP): MP * (1 - MF) if long, MP * (1 + MF) if short. The mark price that would set an account’s total account value to 0.
Liquidation Distance: % move in futures that would make MF = MMF.
Position open size: Max(abs(size if all buy orders get filled), abs(size if all sell orders get filled))
Position open notional: position open size * MP
Total open position notional: sum of abs(position open notional) across all positions
Open margin fraction [OMF]: min(total account value, collateral) / total open position notional
Initial Margin Fraction Requirement [IMF]: the minimum OMF needed to increase position size, equal to average of position IMF for all account positions weighed by position open notional
Unused collateral: max(OMF - IMF, 0) * total open position notional
Backstop Liquidity Provider [BLP]: an account that promises to take on liquidating accounts’ positions
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