Fractional fee charged on a market (taker) fill at the open.
Price increment added (subtracted) to the open for a market buy (sell) to model taker slippage.
Lower bound on the filled position. The deferred target is clamped to [min_position, max_position] before the fill executes.
Upper bound on the filled position. The deferred target is clamped to [min_position, max_position] before the fill executes.
Contract multiplier applied to mark-to-market PnL, fill slippage, and proportional fees.
Fixed fee (or rebate when negative) charged per contract on each fill.
https://screamer.readthedocs.io/en/latest/ for the Python reference and full details.
Backtest a target-position strategy on OHLC bars, executing market orders at the next bar's open (causal, no manual lag).