Max OI strike shift
Many Indian option traders read the strike with the highest put open interest as support and the strike with the highest call open interest as resistance. When those walls move during the day, it is taken as a sign of direction: support shifting up is bullish, resistance shifting down is bearish. This strategy buys the NIFTY ATM call or put whenever such a shift is seen at a 15-minute checkpoint.How it trades
Results
PRE-BUILT · DEFAULTSWhere it made and lost money
OI walls shift for many reasons, and in this test a shift only paid when the day went on to trend. On trend days that closed near their high or low the strategy made ₹80,308 over 92 trades, as the bought option rode a sustained move. On quiet sessions it lost ₹62,266 over 93 trades with a 19% win rate, and on choppy days ₹65,701 over 112, because the walls moved back and forth without the index following, and the 30% premium stop was hit. Gap-down days, which often trend, made ₹55,182 over 49 trades. Expiry days were poor, winning only 16% of 116 trades, as OI on the expiring weekly churns sharply.
About this strategy
- On the nearest NIFTY weekly expiry, look at the five strikes either side of ATM and find the call wall (most call OI) and the put wall (most put OI).
- Every 15 minutes from 09:45 to 14:30, compare the walls with the previous checkpoint.
- If the put wall moved up at least one strike and the call wall did not move down, buy one lot of the ATM call.
- If the call wall moved down at least one strike and the put wall did not move up, buy one lot of the ATM put.
- Exit on the opposite shift (and take the new direction at once), at a 30% loss on the premium paid, or at 15:15.
Why traders use it
Option writers are often seen as the better-informed side of the market, and the strikes where they hold the largest positions are watched as levels they will defend. When put writers move their wall higher, they are signalling confidence that the market will not fall below the new level; the reverse holds for call writers. Watching the walls migrate during the day is a popular way to read that sentiment live, and OI alerts are common in Indian option chain tools.
The year in plain words
On NIFTY from 1 Oct 2025 to 30 Sep 2026 the rules took 305 trades and lost ₹54,204 before costs, winning 28% with a profit factor of 0.83. After ₹20 per order and bid-ask slippage the loss was ₹70,874. The premium stop ended 170 trades, 101 ran to 15:15 and only 34 closed on an opposite shift. Winners averaged about ₹3,200, roughly twice the average loser, but there were far too few of them. Only four months were positive, led by June 2026 at ₹19,234; February 2026 lost ₹27,346 and the longest losing streak was 16 trades.
What the settings do
Risks
- OI changes for hedging, rolling and spread trades, not only directional writing, so many shifts carry no signal.
- A 28% win rate brings long losing runs, 16 trades in a row in this test.
- Bought ATM options lose value quickly on quiet afternoons.
- Expiry-day OI can swing sharply, generating frequent false signals.
Who it suits
Option buyers who follow OI data and want to see a common sentiment rule tested mechanically, and who can accept many small losses waiting for trend days.
Questions traders ask
What does a shift in max OI strike mean?
It means the strike with the largest open interest for puts or calls has changed. Traders read a higher put-OI strike as support moving up, which is bullish, and a lower call-OI strike as resistance moving down, which is bearish.
Is trading the max OI shift profitable?
Not in this test. On NIFTY from 1 Oct 2025 to 30 Sep 2026 it lost ₹54,204 before costs and ₹70,874 after ₹20 per order and bid-ask slippage, over 305 trades. Statutory charges were excluded. Past results do not guarantee future ones.
Is the highest OI strike really support or resistance?
It shows where option writers hold large positions, which they may defend, but OI also builds for hedging and spreads. In this backtest the shifts only paid on trend days, suggesting they confirmed moves rather than predicted them.
Which expiry is used?
The nearest NIFTY weekly expiry, which falls on Tuesday, including on expiry day itself. The minimum days-to-expiry setting can move the strategy to the next weekly instead.