One purchased call
A long call uses a buy-to-open call leg. Set the underlying, expiration and strike rules in the options builder and choose a premium budget that fits the portfolio's buying power.
Expiration payoff
Expiration payoff per underlying share is max(underlying price minus strike, 0) minus the premium paid. Breakeven is strike plus premium. Maximum loss is the premium plus fees, while time decay and volatility can change the option price before expiration.
Verify the implementation
Check that the saved rule buys a call and that its expiry, strike selection and premium budget match your inputs. A completed test should identify which contract was selected on each signal. If the selector returns no contract or market data is missing, inspect those inputs and coverage before treating the absence of trades as a result. Backtest the exact selector rules rather than a hand-picked contract. Inspect the contracts selected on each signal and use paper trading to check orders before choosing a live broker.