Hummingbot Market Maker

WHENWhen implementing position tracking for perpetual derivatives

ACTIONuse trading_pair only as the position key for ONEWAY mode and trading_pair+side for HEDGE mode

CONSEQUENCEPosition collision occurs when different position sides overwrite each other, causing incorrect position tracking and potential financial loss when orders are matched against wrong positions

WHENWhen tracking unrealized PnL in position objects

ACTIONuse Decimal type for each monetary calculations including unrealized_pnl and entry_price

CONSEQUENCEFloating-point precision errors cause incorrect PnL calculations, leading to wrong profit/loss reporting and potentially oversized orders that exceed available margin

WHENWhen validating order candidates against available balance

ACTIONcheck collateral requirements including order collateral, percent fees, and fixed fees before order execution

CONSEQUENCEOrders exceed available margin, causing immediate liquidation or forced position closure at unfavorable prices with partial loss of collateral