Expiry Selection
Expiry Selection determines which options expiration each leg of your strategy targets. Algo Architech offers both fixed and dynamic expiry options to match any trading style.
Expiry Types
Current Week
Targets the nearest upcoming weekly expiry.
| Day | Expiry Targeted |
|---|---|
| Monday | This Thursday/Friday’s expiry |
| Wednesday | This Thursday/Friday’s expiry |
| Thursday (expiry day) | Today’s expiry |
Best for: Ultra-short-term strategies, expiry-day scalping, maximum theta decay.
Next Week
Targets the weekly expiry of the following week.
Best for: Strategies that need slightly more runway than current-week but don’t want monthly-level time horizons.
Current Month
Targets the monthly expiry contract.
Best for: Swing strategies, positional trades, strategies requiring more time premium.
Dynamic Weekly
The most powerful expiry option — targets a contract that is precisely N weeks ahead from the current date.
Dynamic Weekly = 4
On Monday, March 3: Targets expiry on March 28 (4 weeks away)
On Monday, March 10: Targets expiry on April 4 (4 weeks away)
On Monday, March 17: Targets expiry on April 11 (4 weeks away)The Trading Edge
If you’re running theta-decay strategies, consistency matters. Using “Current Month” means your theta decay rate varies wildly depending on when during the month you enter — entering on Day 1 gives you 30 days of decay, entering on Day 25 gives you only 5.
Dynamic Weekly solves this by always selecting an expiry that is a fixed number of weeks away. Every entry, regardless of calendar date, starts with the same theta decay curve. This creates mathematically consistent premium-selling strategies.
Advanced: Day-Based Expiry Logic
Dynamic Weekly also enables intelligent day-of-week switching:
| Day | Dynamic Weekly Config | Result |
|---|---|---|
| Mon–Tue | Dynamic Weekly = 2 | Trade next-to-next week (more runway early in the week) |
| Wed–Fri | Dynamic Weekly = 1 | Trade next week (tighter expiry as the week progresses) |
This can be achieved by creating separate strategy rules for different days.
Choosing the Right Expiry
| Strategy Type | Recommended Expiry |
|---|---|
| Expiry-day scalping | Current Week |
| Short-term premium selling | Next Week |
| Swing / positional trades | Current Month |
| Consistent theta strategies | Dynamic Weekly (3-4 weeks) |
| Volatility plays around events | Current Month or Dynamic Weekly |
Next Steps
Learn how to configure position sizing and order types:
→ Next: Lots, Product Types & Validity