ACondor Explains The 45 To 21 DTE Cycle Behind Its Iron Condor Engine
Oct 17, 2026
ACondor LLC explains why iron condor traders enter around 45 days to expiration and manage at 21, how theta and gamma trade places over the life of a short premium trade, and how its software for tastytrade accounts encodes that cycle as fixed rules.
Las Cruces, United States, October 17, 2026 /NewsNetwork/ -- Iron condor traders who follow the tastytrade school of premium selling tend to repeat the same two numbers: enter around 45 days to expiration, manage at 21. ACondor LLC, the company behind the ACondor options trading software for tastytrade accounts, has published an explanation of where those numbers come from and how its mechanical engine applies them without a trader watching the clock. The full rule set is documented at https://acondor.com/how-it-works
According to the company, the 45 to 21 cycle is a statement about two option Greeks that move in opposite directions as expiration approaches. Theta measures how much value an option loses each day from the passage of time. Gamma measures how fast an option's delta, its sensitivity to the underlying price, changes when the stock moves. Far from expiration, both are small: a short condor collects little decay per day and barely reacts to a normal move in the stock. Close to expiration, both are large: decay is fastest in the final weeks, but a short strike near the money can swing from a comfortable position to a tested one on a single ordinary session.
The entry window exists because of the first half of that curve. An iron condor opened 30 to 65 days out, on a standard monthly expiration, collects enough credit to be worth the four commissions and the buying power it ties up, while leaving room for the underlying to wander and come back. A condor opened with ten days left pays more per day but offers no time to be wrong. ACondor's mechanical engine scans for entries inside the 30 to 65 day band and prefers monthly expirations for their open interest and tighter quotes. The center of that band is about 45 days, which is where the convention comes from.
The 21 day rule exists because of the second half of the curve. Somewhere around three weeks out, the daily decay still looks attractive on paper, but gamma has grown to the point where the remaining credit no longer compensates for how quickly a short strike can be tested. Holding past that point also walks the position toward expiration-week hazards: pin risk at a strike, early assignment on a short that has gone in the money, and the thin, wide markets of a chain in its final days. ACondor treats 21 days as a backstop. If a condor has not already been closed, the software closes it at 21 days to expiration regardless of where it stands.
Most positions never reach the backstop. The engine's first exit rule is the 50 percent rule: when the condor can be bought back for half the credit received, it is closed and the capital is released for the next entry. In a typical cycle that happens somewhere in the middle of the trade's life, well before the 21 day mark. The sequence the software applies on every cycle is fixed and documented: an assignment cleanup if a stock leg has appeared, a news gate that can close a position on high-confidence opposing headlines, the 50 percent rule, delta defense on a tested short strike, and finally the 21 day backstop.
The company notes that 21 days is also where a tested condor gets a decision rather than a reflex. With more than 21 days left and no abnormal move, a short strike that has reached 0.45 delta is defended, rolled further out of the money for a credit or simply held, because time and credit are what make a tested defined-risk position recoverable. Once the calendar reaches 21 days, a tested side can be rolled out to the next monthly cycle, around 45 days again, only when the roll pays a net credit after the broker's own fee calculation. A roll that does not pay is refused and the position is closed instead. The software never chases a losing side with a debit roll.
Every one of these thresholds is a number in the configuration, not a judgment made at the screen, and the position table shows days to expiration and the active rule for each open trade. The company's position is that the value of a 45 to 21 cycle lies less in any single trade than in being applied the same way every time, which is what a human trader with a day job struggles to do and what software does by default.
ACondor is software, not investment advice. Nothing here is a guarantee of any trading result, and options trading carries substantial risk of loss. A rule that closes at 21 days limits exposure to the final weeks of a contract; it does not prevent losses before then.
Traders who want the 45 to 21 cycle run mechanically on a tastytrade account can request early access at https://acondor.com/early-access
Contact Info:
Name: Robin Lilly
Email: Send Email
Organization: ACondor LLC
Address: 2521 North Main Street, Las Cruces Unit 1-276, Las Cruces, New Mexico 88001, United States
Phone: +1-575-312-9326
Website: https://acondor.com
Source: NewsNetwork
Release ID: 89206496
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