Calmer-than-priced straddle
This intraday NIFTY option-selling strategy sells the at-the-money straddle only when the market has recently been calmer than option prices suggest. Every five minutes it compares the hourly move implied by the last 60 minutes of futures prices with the hourly move the straddle premium is pricing in. If the market is quieter than priced, it sells; if that flips, it gets out. Stops are sized from the same volatility forecast.How it trades
Results
PRE-BUILT · DEFAULTSWhere it made and lost money
In this test choppy days were the problem: 94 trades on wide-range sessions closing mid-range lost ₹40,705 with a 51% win rate, as swings stopped legs and the ratio exit cut trades after losses. Trend days made ₹56,229 over 88 trades with a 69% win rate, and quiet days ₹35,987 over 140: on a quiet day nothing moves, and on a trend day one leg is stopped while the other decays. Weekly expiry days made ₹22,962 over 105 trades and other days ₹28,550 over 217. Gap-up openings made ₹33,401 over 43 trades.
About this strategy
- Every 5 minutes from 09:20, estimate the expected one-hour move from the last 60 one-minute returns of the near-month NIFTY future.
- Convert the ATM straddle premium of the nearest weekly expiry into the move it implies per hour of trading time left to expiry, and divide the first number by the second.
- If that ratio is below 0.9 and no straddle is open, sell the ATM call and put; entries are allowed until 14:30, one straddle at a time, with a 5-minute pause after each exit.
- Each leg's stop is 1.25 times the forecast move, halved for one leg, kept between 15% and 80% of its premium; a combined stop on the whole straddle sits between 10% and 50% of the premium.
- Take profit at a 40% gain; once the gain has reached 15%, close if it falls back to zero.
- Exit early if the ratio rises above 1.1 while both legs are open, and close everything at 15:15.
Why traders use it
A short straddle is a bet that the market will move less than the premium implies. Most straddle sellers enter at a fixed time and ignore whether options are cheap or dear. This version tries to sell only when realised movement is clearly below what is priced in, and to step aside when the market starts moving more than expected. Sizing stops from the same forecast keeps them in proportion to current conditions rather than a fixed percentage.
The year in plain words
On NIFTY from 1 Oct 2025 to 30 Sep 2026 with default settings, the strategy made 325 trades, won 63% and made ₹50,218 before costs with a profit factor of 1.22. Average losses (₹1,936) were larger than average wins (₹1,378), but the win rate covered the gap. Most trades (212) ran to 15:15; 36 were closed early by the ratio flip, 33 by a leg stop and only 12 at the target. December made ₹18,431 and September lost ₹9,739. After ₹20 per order and bid-ask slippage the result was a ₹98 loss: costs on about 27 trades a month consumed the whole edge, and filling at bid and ask triggered more combined stops (27 against 11).
What the settings do
Risks
- One hour of realised movement is a noisy forecast and can look calm just before a large move.
- Several re-entries in one day multiply costs and can stack losses on a choppy session.
- Short straddles carry gap and trend risk; stops can fill beyond their levels in fast markets.
- The ATM straddle needs margin for two naked short options.
Who it suits
Option sellers who think in terms of realised versus implied volatility, can automate checks every few minutes, and accept that its before-costs edge was used up by costs in this test.
Questions traders ask
How does this straddle decide when to sell?
It compares two numbers every five minutes: the hourly move suggested by the last hour of NIFTY futures prices, and the hourly move the ATM straddle's premium implies until expiry. When the first is below 90% of the second, the market looks calmer than options assume, and the straddle is sold.
Is the realised-versus-implied straddle profitable?
In this backtest from 1 Oct 2025 to 30 Sep 2026 it made ₹50,218 before costs with a 63% win rate, but lost ₹98 after ₹20 per order and bid-ask slippage, before statutory charges. After costs it was close to breakeven. Past results do not guarantee future ones.
What is the difference between realised and implied volatility?
Realised volatility measures how much the price has actually moved. Implied volatility is the movement option prices assume for the future. Option sellers earn money when realised movement turns out lower than implied.
Which expiry does it trade?
The nearest NIFTY weekly expiry, which falls on Tuesday. The priced move is scaled by the trading minutes left until that expiry, so the comparison stays fair whether expiry is today or several days away.