Straddle with trailing leg stops
This intraday short straddle sells the NIFTY at-the-money call and put at 11:00, later than the usual morning straddles, and manages each leg with a stop that trails down as the leg decays. Each leg starts with a stop 30% above its entry; for every 5 points the leg falls, the stop moves 5 points lower. Whatever survives is closed at 14:30.How it trades
Results
PRE-BUILT · DEFAULTSWhere it made and lost money
Every condition in this test was profitable, but not equally. Trend days earned the most, ₹83,919 over 70 trades: the leg on the wrong side hit its stop early for a limited loss, while the other leg's trailing stop ratcheted down as it decayed and locked in most of its premium. Evenings with India VIX above 14.5 added ₹59,862 over 69 trades, because richer premiums give the trail more room to work. Quiet sessions were the weakest at ₹19,179 over 108 trades: with little movement, neither leg decayed far enough after 11:00 to make the trail matter, leaving only small gains.
About this strategy
- At 11:00, find the ATM strike of the nearest NIFTY weekly expiry and sell one lot each of the call and the put.
- Give each leg an initial stop 30% above its own entry premium.
- Track each leg's lowest premium so far. For every full 5 points it has fallen from entry, lower that leg's stop by 5 points. Part-steps do not count, so a 9-point fall moves it only 5.
- If a leg's premium rises to its current stop, buy back that leg alone. The other leg keeps its own trailing stop.
- An optional setting delays trailing until a leg is a chosen percentage in profit; by default trailing starts immediately.
- At 14:30, close any leg that is still open. One straddle a day, no re-entry.
Why traders use it
A fixed stop treats a leg that has already decayed 40% the same as one just sold, so a late-day reversal can hand back the whole gain. Trailing the stop down with the premium locks in part of the decay as it happens. Starting at 11:00 skips the opening swings, when many morning straddles get stopped out, and closing at 14:30 avoids the final hour. The X-for-Y trail is a common feature in Indian algo platforms, which made this variant popular.
The year in plain words
On NIFTY from 1 Oct 2025 to 30 Sep 2026 with default settings, the strategy traded 246 days, won 61% of them and made ₹1,33,792 before costs with a profit factor of 2.34. Average wins (₹1,549) were larger than average losses (₹1,053), and the maximum drawdown was only ₹7,004. 173 trades ran to 14:30 and 73 ended on a trailing stop. Eleven of twelve months were positive; April was the strongest at ₹31,276 and May was flat. After ₹20 per order and bid-ask slippage the profit is ₹84,258. The backtest fills stops exactly at their level, which flatters trailing stops on fast moves.
What the settings do
Risks
- Stops are filled at their exact level in the backtest; on a quick spike a real fill can be several points worse, which matters for a stop placed close to price.
- After one leg stops out, the other is an unhedged short option until 14:30.
- The strong result comes from a single year; a different volatility regime could look very different.
- Short straddles need margin, and a gap or event move can still produce a loss larger than the year's typical bad day.
Who it suits
Traders who want an automated intraday option-selling routine with an active stop on each leg, can run it every day without manual tweaks, and have the margin for a NIFTY short straddle.
Questions traders ask
What is a trailing stop on a straddle leg?
Each sold option has its own stop that moves down as the option's premium falls. Here, for every 5 points a leg's premium drops from its entry, its stop is lowered by 5 points. The stop never moves back up, so part of the decay is locked in.
Is the 11 AM straddle with trailing stops profitable?
In this backtest on NIFTY from 1 Oct 2025 to 30 Sep 2026 it made ₹1,33,792 before costs and ₹84,258 after ₹20 per order and bid-ask slippage, with a ₹7,004 maximum drawdown before costs. Stops filled at their exact level, which is optimistic. Past results do not guarantee future ones.
Why enter at 11:00 instead of 09:20?
By 11:00 the opening swings have usually settled, so the straddle is less likely to be stopped out on early noise. The trade-off is less premium and less time for decay. The entry time is a setting you can change.
What does 5/5 trailing mean?
It is shorthand for 'for every 5 points of profit, move the stop 5 points'. Some traders use unequal pairs, such as 10/5, to trail more loosely. The trail unit can also be set to percentages of the entry premium instead of points.