Tune the theta-positive credit-spread engine. Changes save instantly and apply to the next entry. SIM paper only — never touches a live order.
🧪 This controls the Theta Shadow engine only — a separate autonomous lab from your Directional Shadow. Both run in parallel (SIM paper, separate ledgers). Turn Theta on/off from the dashboard ↗.
Engine
The credit-spread structure and how it's sized.
Enabled
Master on/off for the Theta Shadow loop.
Symbols (basket)
Comma-separated underlyings. Each runs the strategy independently — one+ spread per symbol per day. e.g. SPY,QQQ,IWM
Structure
Defined-risk credit structure.
DTE
Days to expiry at entry. Backtest winner: 3.
Short delta
Delta of the short strike (as %). 16 ≈ 1 standard-dev OTM.
Spread width $
Distance to the long (protective) strike — caps max loss. Used when Width % = 0.
Width % of price
>0 = size the spread width as a % of the stock price instead of fixed $ — keeps credit-to-risk consistent across a mixed-price basket (e.g. 1.0 ≈ 1% of spot). 0 = use the fixed $ width above.
Contracts
Spreads per entry.
Max entries / day
Per symbol. 1 = the validated cadence. >1 ladders extra re-entries through the day for more data (beyond the backtest).
Entry spacing (min)
Minutes to wait between entries on the same symbol, so they ladder instead of stacking at one price.
Pricing & management
The vol you sell and the exit rules.
Fixed IV %
Implied vol used to price the spread. Credit selling is vol-sensitive — set deliberately (18 default).
Profit target %
Close once this % of the credit is captured (50 = take half).
Stop × credit
Close if the loss reaches this multiple of the credit taken (2 = down 2× credit).