Spread book

Theta by underlying and expiration

Right means more theta for each unit of gamma. These hold up better through a sharp move.

Up means more theta for each unit of vega. These hold up better through an IV spike.

The shaded corner is below the median on both. Those spreads are the first to close when you want capital back.

Select a heading to sort. Gains count toward the close at 50% of max profit, losses toward the stop at 25% of max loss.

What the columns mean

Days: Days to expiration as of the snapshot. Highlighted at 21 or fewer, the window to close or roll before gamma speeds up.
PoP: OptionStrat's probability that both legs expire worthless and you keep the full credit.
EV: PoP × max profit − (1 − PoP) × max loss. It treats the trade as all or nothing, so it's usually negative for credit spreads. Use it to compare positions, not as a signal on its own.
Toward an exit: A gain is shown as a share of max profit and counts toward the close at 50%. A loss is shown as a share of max loss and counts toward the stop at 25%. The bar's left end is the stop and its right end is the close.
Theta: Dollars earned per day from time decay, all else equal.
Delta: Direction. Bull puts are positive, bear calls negative.
Gamma: How fast delta moves against you. Negative for credit spreads, and largest near expiration and near the short strike.
Vega: Dollars lost per one-point rise in implied volatility.
IV: Implied volatility from the export.
Θ per Γ: Theta earned for each unit of gamma. Low values are the most exposed to a sharp move. Blank when gamma is zero.
Θ per V: Theta earned for each unit of vega. Low values are the first to close into a volatility spike.